diff --git a/htdocs/admin/menus/edit.php b/htdocs/admin/menus/edit.php
index cf42f294d03..6bacc97e92f 100644
--- a/htdocs/admin/menus/edit.php
+++ b/htdocs/admin/menus/edit.php
@@ -87,7 +87,8 @@ if ($action == 'update')
         $result=$menu->fetch(GETPOST('menuId', 'int'));
         if ($result > 0)
         {
-            $menu->titre=GETPOST('titre', 'alpha');
+            $menu->titre=GETPOST('titre', 'alpha');		// deprecated
+            $menu->title=GETPOST('titre', 'alpha');
             $menu->leftmenu=GETPOST('leftmenu', 'aZ09');
             $menu->url=GETPOST('url', 'alpha');
             $menu->langs=GETPOST('langs', 'alpha');
@@ -205,7 +206,8 @@ if ($action == 'add')
         $menu = new Menubase($db);
         $menu->menu_handler=preg_replace('/_menu$/', '', GETPOST('menu_handler', 'aZ09'));
         $menu->type=GETPOST('type', 'alpha');
-        $menu->titre=GETPOST('titre', 'alpha');
+        $menu->titre=GETPOST('titre', 'alpha');		// deprecated
+        $menu->title=GETPOST('titre', 'alpha');
         $menu->url=GETPOST('url', 'alpha');
         $menu->langs=GETPOST('langs', 'alpha');
         $menu->position=GETPOST('position', 'int');
@@ -494,7 +496,7 @@ elseif ($action == 'edit')
     //print '<tr><td>'.$langs->trans('Level').'</td><td>'.$menu->level.'</td><td>'.$langs->trans('DetailLevel').'</td></tr>';
 
     // Title
-    print '<tr><td class="fieldrequired">'.$langs->trans('Title').'</td><td><input type="text" class="minwidth300" name="titre" value="'.dol_escape_htmltag($menu->titre).'"></td><td>'.$langs->trans('DetailTitre').'</td></tr>';
+    print '<tr><td class="fieldrequired">'.$langs->trans('Title').'</td><td><input type="text" class="minwidth300" name="titre" value="'.dol_escape_htmltag($menu->titre ? $menu->titre : $menu->title).'"></td><td>'.$langs->trans('DetailTitre').'</td></tr>';
 
     // Url
     print '<tr><td class="fieldrequired">'.$langs->trans('URL').'</td><td><input type="text" class="quatrevingtpercent" name="url" value="'.$menu->url.'"></td><td>'.$langs->trans('DetailUrl').'</td></tr>';
diff --git a/htdocs/admin/menus/index.php b/htdocs/admin/menus/index.php
index d1b56d51cee..1790eaf5aee 100644
--- a/htdocs/admin/menus/index.php
+++ b/htdocs/admin/menus/index.php
@@ -244,13 +244,13 @@ print "<br>\n";
 // Confirmation for remove menu entry
 if ($action == 'delete')
 {
-	$sql = "SELECT m.titre";
+	$sql = "SELECT m.titre as title";
 	$sql.= " FROM ".MAIN_DB_PREFIX."menu as m";
 	$sql.= " WHERE m.rowid = ".GETPOST('menuId', 'int');
 	$result = $db->query($sql);
 	$obj = $db->fetch_object($result);
 
-    print $form->formconfirm("index.php?menu_handler=".$menu_handler."&menuId=".GETPOST('menuId', 'int'), $langs->trans("DeleteMenu"), $langs->trans("ConfirmDeleteMenu", $obj->titre), "confirm_delete");
+    print $form->formconfirm("index.php?menu_handler=".$menu_handler."&menuId=".GETPOST('menuId', 'int'), $langs->trans("DeleteMenu"), $langs->trans("ConfirmDeleteMenu", $obj->title), "confirm_delete");
 }
 
 $newcardbutton='';
diff --git a/htdocs/compta/facture/card.php b/htdocs/compta/facture/card.php
index 968469ff1e0..2f017b485d6 100644
--- a/htdocs/compta/facture/card.php
+++ b/htdocs/compta/facture/card.php
@@ -2773,7 +2773,7 @@ if ($action == 'create')
 		$note_public = $invoice_predefined->note_public;
 		$note_private = $invoice_predefined->note_private;
 
-		$sql = 'SELECT r.rowid, r.titre, r.total_ttc';
+		$sql = 'SELECT r.rowid, r.titre as title, r.total_ttc';
 		$sql .= ' FROM ' . MAIN_DB_PREFIX . 'facture_rec as r';
 		$sql .= ' WHERE r.fk_soc = ' . $invoice_predefined->socid;
 
@@ -2797,7 +2797,7 @@ if ($action == 'create')
 						print ' selected';
 						$exampletemplateinvoice->fetch(GETPOST('fac_rec'));
 					}
-					print '>' . $objp->titre . ' (' . price($objp->total_ttc) . ' ' . $langs->trans("TTC") . ')</option>';
+					print '>' . $objp->title . ' (' . price($objp->total_ttc) . ' ' . $langs->trans("TTC") . ')</option>';
 					$i ++;
 				}
 				print '</select>';
diff --git a/htdocs/compta/facture/class/facture-rec.class.php b/htdocs/compta/facture/class/facture-rec.class.php
index f6b148d308c..37a031198bc 100644
--- a/htdocs/compta/facture/class/facture-rec.class.php
+++ b/htdocs/compta/facture/class/facture-rec.class.php
@@ -123,7 +123,8 @@ class FactureRec extends CommonInvoice
 		$now=dol_now();
 
 		// Clean parameters
-		$this->titre=trim($this->titre);
+		$this->titre=trim($this->titre);	// deprecated
+		$this->title=trim($this->title);
 		$this->usenewprice=empty($this->usenewprice)?0:$this->usenewprice;
 		if (empty($this->suspended)) $this->suspended=0;
 
@@ -180,7 +181,7 @@ class FactureRec extends CommonInvoice
 			$sql.= ", multicurrency_tx";
 			$sql.= ", suspended";
 			$sql.= ") VALUES (";
-			$sql.= "'".$this->db->escape($this->titre)."'";
+			$sql.= "'".$this->db->escape($this->titre ? $this->titre : $this->title)."'";
 			$sql.= ", ".$facsrc->socid;
 			$sql.= ", ".$conf->entity;
 			$sql.= ", '".$this->db->idate($now)."'";
@@ -376,7 +377,7 @@ class FactureRec extends CommonInvoice
 	 */
 	public function fetch($rowid, $ref = '', $ref_ext = '', $ref_int = '')
 	{
-		$sql = 'SELECT f.rowid, f.entity, f.titre, f.suspended, f.fk_soc, f.amount, f.tva, f.localtax1, f.localtax2, f.total, f.total_ttc';
+		$sql = 'SELECT f.rowid, f.entity, f.titre as title, f.suspended, f.fk_soc, f.amount, f.tva, f.localtax1, f.localtax2, f.total, f.total_ttc';
 		$sql.= ', f.remise_percent, f.remise_absolue, f.remise';
 		$sql.= ', f.date_lim_reglement as dlr';
 		$sql.= ', f.note_private, f.note_public, f.fk_user_author';
@@ -410,8 +411,9 @@ class FactureRec extends CommonInvoice
 
 				$this->id                     = $obj->rowid;
 				$this->entity                 = $obj->entity;
-				$this->titre                  = $obj->titre;
-				$this->ref                    = $obj->titre;
+				$this->titre                  = $obj->title;	// deprecated
+				$this->title                  = $obj->title;
+				$this->ref                    = $obj->title;
 				$this->ref_client             = $obj->ref_client;
 				$this->suspended              = $obj->suspended;
 				$this->type                   = $obj->type;
diff --git a/htdocs/compta/facture/fiche-rec.php b/htdocs/compta/facture/fiche-rec.php
index dd4a2af11ee..39f913fbf76 100644
--- a/htdocs/compta/facture/fiche-rec.php
+++ b/htdocs/compta/facture/fiche-rec.php
@@ -187,7 +187,8 @@ if (empty($reshook))
 
 		if (! $error)
 		{
-			$object->titre = GETPOST('titre', 'alpha');
+			$object->titre = GETPOST('titre', 'alpha');	// deprecated
+			$object->title = GETPOST('titre', 'alpha');
 			$object->note_private = GETPOST('note_private', 'none');
             $object->note_public  = GETPOST('note_public', 'none');
             $object->modelpdf = GETPOST('modelpdf', 'alpha');
@@ -295,8 +296,9 @@ if (empty($reshook))
 		$result=$object->setValueFrom('titre', GETPOST('ref', 'alpha'), '', null, 'text', '', $user, 'BILLREC_MODIFY');
 		if ($result > 0)
 		{
-			$object->titre = GETPOST('ref', 'alpha');
-			$object->ref = $object->titre;
+			$object->titre = GETPOST('ref', 'alpha');	// deprecated
+			$object->title = GETPOST('ref', 'alpha');
+			$object->ref = $object->title;
 		}
 		else dol_print_error($db, $object->error, $object->errors);
 	}
diff --git a/htdocs/compta/facture/invoicetemplate_list.php b/htdocs/compta/facture/invoicetemplate_list.php
index 5da37d46fd5..1226f7c8a79 100644
--- a/htdocs/compta/facture/invoicetemplate_list.php
+++ b/htdocs/compta/facture/invoicetemplate_list.php
@@ -213,7 +213,7 @@ $today = dol_mktime(23, 59, 59, $tmparray['mon'], $tmparray['mday'], $tmparray['
 /*
  *  List mode
  */
-$sql = "SELECT s.nom as name, s.rowid as socid, f.rowid as facid, f.titre, f.total, f.tva as total_vat, f.total_ttc, f.frequency, f.unit_frequency,";
+$sql = "SELECT s.nom as name, s.rowid as socid, f.rowid as facid, f.titre as title, f.total, f.tva as total_vat, f.total_ttc, f.frequency, f.unit_frequency,";
 $sql.= " f.nb_gen_done, f.nb_gen_max, f.date_last_gen, f.date_when, f.suspended,";
 $sql.= " f.datec, f.tms,";
 $sql.= " f.fk_cond_reglement, f.fk_mode_reglement";
@@ -514,7 +514,7 @@ if ($resql)
 			$invoicerectmp->unit_frequency=$objp->unit_frequency;
 			$invoicerectmp->nb_gen_max=$objp->nb_gen_max;
 			$invoicerectmp->nb_gen_done=$objp->nb_gen_done;
-			$invoicerectmp->ref=$objp->titre;
+			$invoicerectmp->ref=$objp->title;
 
 			print '<tr class="oddeven">';
 
diff --git a/htdocs/core/class/menubase.class.php b/htdocs/core/class/menubase.class.php
index d1d7534af23..26f96b93ec5 100644
--- a/htdocs/core/class/menubase.class.php
+++ b/htdocs/core/class/menubase.class.php
@@ -422,7 +422,8 @@ class Menubase
         $this->position='';
         $this->url='http://dummy';
         $this->target='';
-        $this->titre='Specimen menu';
+        $this->titre='Specimen menu';		// deprecated
+        $this->title='Specimen menu';
         $this->langs='';
         $this->level='';
         $this->leftmenu='';
diff --git a/htdocs/core/modules/DolibarrModules.class.php b/htdocs/core/modules/DolibarrModules.class.php
index 4a8135800ae..16d3969652d 100644
--- a/htdocs/core/modules/DolibarrModules.class.php
+++ b/htdocs/core/modules/DolibarrModules.class.php
@@ -1938,7 +1938,8 @@ class DolibarrModules // Can not be abstract, because we need to instantiate it
             $menu->type=$this->menu[$key]['type'];
             $menu->mainmenu=isset($this->menu[$key]['mainmenu'])?$this->menu[$key]['mainmenu']:(isset($menu->fk_mainmenu)?$menu->fk_mainmenu:'');
             $menu->leftmenu=isset($this->menu[$key]['leftmenu'])?$this->menu[$key]['leftmenu']:'';
-            $menu->titre=$this->menu[$key]['titre'];
+            $menu->titre=$this->menu[$key]['titre'];	// deprecated
+            $menu->title=$this->menu[$key]['titre'];
             $menu->url=$this->menu[$key]['url'];
             $menu->langs=$this->menu[$key]['langs'];
             $menu->position=$this->menu[$key]['position'];
diff --git a/htdocs/fichinter/card-rec.php b/htdocs/fichinter/card-rec.php
index 6ee445d68a1..63183c73d1d 100644
--- a/htdocs/fichinter/card-rec.php
+++ b/htdocs/fichinter/card-rec.php
@@ -129,7 +129,7 @@ if ($action == 'add') {
 
 	if (! $error) {
 		$object->id_origin		= $id;
-		$object->titre			= GETPOST('titre', 'alpha');
+		$object->title			= GETPOST('titre', 'alpha');
 		$object->description	= GETPOST('description', 'alpha');
 		$object->socid			= GETPOST('socid', 'alpha');
 		$object->fk_project		= GETPOST('projectid', 'int');
@@ -773,7 +773,7 @@ $date_next_execution = (GETPOST('remonth') ? dol_mktime(
 		/*
 		 *  List mode
 		 */
-		$sql = "SELECT f.rowid as fich_rec, s.nom as name, s.rowid as socid, f.rowid as facid, f.titre,";
+		$sql = "SELECT f.rowid as fich_rec, s.nom as name, s.rowid as socid, f.rowid as facid, f.titre as title,";
 		$sql.= " f.duree, f.fk_contrat, f.fk_projet as fk_project, f.frequency, f.nb_gen_done, f.nb_gen_max,";
 		$sql.= " f.date_last_gen, f.date_when, f.datec";
 
@@ -844,7 +844,7 @@ $date_next_execution = (GETPOST('remonth') ? dol_mktime(
 
 					print '<tr class="oddeven">';
 					print '<td><a href="'.$_SERVER['PHP_SELF'].'?id='.$objp->fich_rec.'">';
-					print img_object($langs->trans("ShowIntervention"), "intervention").' '.$objp->titre;
+					print img_object($langs->trans("ShowIntervention"), "intervention").' '.$objp->title;
 					print "</a></td>\n";
 					if ($objp->socid) {
 						$companystatic->id=$objp->socid;
diff --git a/htdocs/projet/class/api_projects.class.php b/htdocs/projet/class/api_projects.class.php
index 48ae3cbf337..b6f9acbf4b5 100644
--- a/htdocs/projet/class/api_projects.class.php
+++ b/htdocs/projet/class/api_projects.class.php
@@ -546,7 +546,6 @@ class Projects extends DolibarrApi
         // phpcs:enable
         $object = parent::_cleanObjectDatas($object);
 
-        unset($object->titre);
         unset($object->datec);
         unset($object->datem);
         unset($object->barcode_type);
diff --git a/htdocs/projet/class/project.class.php b/htdocs/projet/class/project.class.php
index 9a651ec4a0a..0c7495efa7e 100644
--- a/htdocs/projet/class/project.class.php
+++ b/htdocs/projet/class/project.class.php
@@ -74,12 +74,9 @@ class Project extends CommonObject
 
 	/**
 	 * @var string
-	 * @deprecated
-	 * @see $title
 	 */
-	public $titre;
-
     public $title;
+
     public $date_start;
     public $date_end;
     public $date_close;
@@ -465,7 +462,6 @@ class Project extends CommonObject
                 $this->id = $obj->rowid;
                 $this->ref = $obj->ref;
                 $this->title = $obj->title;
-                $this->titre = $obj->title; // TODO deprecated
                 $this->description = $obj->description;
                 $this->date_c = $this->db->jdate($obj->datec);
                 $this->datec = $this->db->jdate($obj->datec); // TODO deprecated