I guess this comes down to what you mean by "title". You can edit a photo (using some program) and add text on top of the photo, so that it will appear on the photo when viewed. You should be able to do this in photoshop, but you must save the photo to a format iPad can read (.jpg, or .png, etc.). Other than this, I don't know what adding a title means. On photobucket, you can associate captions with photos, but they are not part of the file, they just go along with the photo when viewed.
I'm moving this question over to the iPad General Discussions sub-forum as it will receive better response there.