Index: wp-includes/link-template.php
===================================================================
--- wp-includes/link-template.php	(revision 17389)
+++ wp-includes/link-template.php	(working copy)
@@ -515,8 +515,8 @@
 	$url = get_post_comments_feed_link($post_id, $feed);
 	if ( empty($link_text) )
 		$link_text = __('Comments Feed');
-
-	echo apply_filters( 'post_comments_feed_link_html', "<a href='$url'>$link_text</a>", $post_id, $feed );
+	$title = esc_html( sprintf( __('Comments Feed for %1$s'), get_the_title( $post_id ) ) );
+	echo apply_filters( 'post_comments_feed_link_html', "<a href='$url' title='$title'>$link_text</a>", $post_id, $feed );
 }
 
 /**