Have solved it.
<div><a target="_blank" href="https://wordpress.stackexchange.com/questions/343707/<?php the_field("title_link', $this->post->ID); ?>" rel="bookmark" title="<?php echo get_the_title( $this->post->ID );//$title; ?>"><?php echo get_the_title( $this->post->ID ); //$title; ?></a> </div>