My favorite "cheap unavoidable Titan death" is during the square pattern of bombs in P5, when he throws the landslide right as the bombs are about to go off. If he throws it right in front of you, you're dead. If you stop to avoid it the bombs blow you up, and if you keep moving you get bopped off the edge.

Also love it when you get three WoTLs that spawn in a triangle with you in the center. There's no direction you can move to get out of that big an area in time.

Those are the only things I ever die to on Titan anymore. And they're all bad luck, so it happens maybe once in every ten runs.