Words, yes that's it words. Search engines can only read words. A word is text you can select and copy with your cursor. Search engines can only read words. If you make some fancy picture with the title. Search engines will not see any thing. Always make sure the title of the page and some key words about that page are there near the top of the page and not in some picture.
If you want to see what a search engines when it visits your website use a Lynx viewer. Lynx is a very early browser that does not read pictures but it also amazingly close to what Google will see when it visits your site.
There is a sample Lynx viewer at http://www.delorie.com