Step 1: create a necromancer character
Step 2: acquire “Drunken” title prefix by leveling necromancer to 90 and leveling up healing potion at the apothacary
Step 3: create a wizard character
Step 4: acquire “Master” title suffix by leveling wizard to 50
Step 5: on necromancer character, edit title, selecting Drunken and Master
Step 6: take waypoint anywhere
Step 6a: tab to Google Chrome while waiting for new location to load, then tab back (may or may not be relevant)
Step 7: view character; note that in place of title “Drunken Master” is the text “No Title selected” [sic]
Step 8: edit profile, note that “Drunken” is still selected for prefix but “Master” suffix is no longer selected
I tried that title before, it always change back to no title, so I started using another. Seems like that combination is restricted.