Titles are now part of the Project File. You can export them and then import them into a new project, where it becomes a part of that new project. When you save the project, the titles are saved.
If you want to make a new title from an existing title, there is a button at the top of the window for that.
By the way, in Jacob Rosenberg’s training videos on What’s New in Premiere Pro 2.0 for Total Training he shows a nifty trick for putting the title window into the panels of a workspace so you can dock them just like any other tab. Pretty cool stuff.
Steven
http://www.stevengotz.com