Turn on/off page titles on a per page basis, and set sitewide defaults from Theme Settings. Must be using the Genesis theme.
This plugin lets you easily remove the page title from specific pages. Don't want "Home" at the top of your homepage? Activate, then edit the homepage and check "Hide".
You can also set sitewide defaults. If you don't want page titles on any pages, go to Genesis > Theme Settings > Title Toggle and check the appropriate box. Once a post type has the default set to remove, when editing a page you can selectively turn on that page's title.
Finally, if you're comfortable with code you can use the
be_title_toggle_post_types filter to change the post types this applies to (it only applies to pages by default).