Broker Character Titles is a very simple LDB launcher plugin providing a dropdown menu on right-click, that you can use to fast-switch between your available character titles. Just select a new title and it will be automatically set for your character.
The addon also automatically hides the usual dropdown list for titles, in the Character PaperDoll window, since it effectively replaces its functionality. Last but not least, left-clicking the launcher will open the PaperDoll window.