Index: wp-includes/class-wp-admin-bar.php
===================================================================
--- wp-includes/class-wp-admin-bar.php	(revisione 35855)
+++ wp-includes/class-wp-admin-bar.php	(copia locale)
@@ -503,7 +503,7 @@
 					?> target="<?php echo esc_attr( $node->meta['target'] ); ?>"<?php
 				endif;
 				if ( ! empty( $node->meta['title'] ) ) :
-					?> title="<?php echo esc_attr( $node->meta['title'] ); ?>"<?php
+					?> aria-label="<?php echo esc_attr( $node->meta['title'] ); ?>"<?php
 				endif;
 				if ( ! empty( $node->meta['rel'] ) ) :
 					?> rel="<?php echo esc_attr( $node->meta['rel'] ); ?>"<?php
@@ -518,7 +518,7 @@
 			else:
 				?><div class="ab-item ab-empty-item" <?php echo $aria_attributes;
 				if ( ! empty( $node->meta['title'] ) ) :
-					?> title="<?php echo esc_attr( $node->meta['title'] ); ?>"<?php
+					?> aria-label="<?php echo esc_attr( $node->meta['title'] ); ?>"<?php
 				endif;
 				if ( ! empty( $node->meta['lang'] ) ) :
 					?> lang="<?php echo esc_attr( $node->meta['lang'] ); ?>"<?php