Jogger,
Do you mean the title on each post or on each page?
You don’t need to alter php files to hide titles. You can use the following Custom CSS
.post-title, .entry-title, .post-meta {display:none}
.post-title, .entry-title {display:none}
will eliminate the entry title.
.post-meta {display:none}
will eliminate the tag and author information at the top of the post.
And as per the forum rules be sure to include a link to your page.
Hope this helps. Good luck!
Ken