The Trashmaster's Mantle automatically sets your title to Trashmaster on every equip and login. Blizzard doesn't allow for automatic setting of titles, but this AddOn provides you with a button to click upon login and when equipping the item.
Clicking the button restores your old title. You might have to set your prefered title once when starting to use this AddOn.
The AddOn also hides the annoying bulge of buggy "You earned ... Trashmaster ...", "You lost ... Trashmaster ..." messages at login.