Remove "Comments" title section from node template
You can hide it via css or you can change the tpl file:

Look for the comment-wrapper.tpl.php file in your theme. If it doe not exist there, you can copy it from the modules/comment folder into your theme folder. Edit the file and remove the line:

&lt;h2 class="title"&gt;&lt;?php print t('Comments'); ?&gt;&lt;/h2&gt;