[Plugin: WordPress Loop] How to hide title of posts ?

if you are using the default template you need to go into wp-content/default and open up index.php and remove <h2>” rel=”bookmark” title=”Permanent Link to <?php the_title_attribute(); ?>”><?php the_title(); ?></h2>

if you are using a custom template you need to remove the <?php the_title(); ?>

@kgjerstad: A link to your site would help.

@kgjerstad: Are you using the WordPress Loop plugin or is this a general question?

In the case of WordPress Loop:
.entry-title { display: none; }