lmilesw's suggestion is a good one, but be aware that if you enter the 'display:none' then you won;t see eithor page or post titles.
If that is what you want, then you could also go to ATO->Style & edit CENTER COLUMN->The LOOP and remove the line
HTML Code:
<?php bfa_post_headline('<div class="post-headline">','</div>'); ?>
which would reduce the number of lines of code being run
If you ONLY want to prevent the PAGE titles from displaying, then change the line above to
HTML Code:
<?php if (!is_page()) { bfa_post_headline('<div class="post-headline">','</div>'); } ?>