Not Titan but I just rage quit sunken temple because of an issue like this. On second boss I normally don't have any trouble getting out of the boulder clap but today, for some reason, I did. If the boss was in melee range it was no trouble because I'm in the narrow part of the cone. If he used it on me at range, where I was in the center of the cone, I could immediately move out of the red and still get hit when the move went off. This happened 3 times and the move is an instant kill.

I bind A and D to strafe and I move immediately but I'm still failing and it's incredibly frustrating.