Page/Post link displaying its TITLE

There really isn’t enough information in your original post to give a proper answer to your question, but I’ll give a “best guess” about what you are attempting to do:

I think, you would like to have posts (or pages) that are related to the post/page that is presently being displayed, displayed in a box, say in a sidebar.

Assuming these are posts/pages are on your site, why would you not use a Relationship field for this? Then you would basically use the code from the ACF website to build your links to the posts.

/*
*  Loop through post objects ( don't setup postdata )
*  Using this method, the $post object is never changed so all functions need a second parameter of the post ID in question.
*/

$posts = get_field('relationship');

if( $posts ): ?>
	<ul>
	<?php foreach( $posts as $post_object): ?>
	    <li>
	    	<a href="<?php echo get_permalink($post_object->ID); ?>"><?php echo get_the_title($post_object->ID); ?></a>
	    </li>
	<?php endforeach; ?>
	</ul>
<?php endif;