If you have created a nice custom title you can make it available to all Kdenlive users.
You can browse the list of existing templates [1] and modify or create a new one [2]. Once a the template is created on the website, it can be automatically installed by all Kdenlive users (requires Kdenlive >= 0.7.8) from the menu "Settings > Download New Title Templates...".
Links:
[1] http://kdenlive.org/title-templates
[2] http://kdenlive.org/node/add/title-template