You can disable the titlebars in those frames entirely if you want to (rather then just renaming them, which you can also do). To rename them look into the title shortening rules, to remove the titlebars entirely you need to switch the frame to the frame-tiled-alt setting (but I can't recall how to do that offhand, and I'm not in front of ion at the moment, so hopefully someone will chime in with the right thing.)
-Etan
