I'm not sure you can just pull someone out of a pure Titan like you can a Shifter, I'm guessing you probably can't, but don't know.
Though I guess I wonder if they'll say for sure one way or the other
Guess this confirms that he tried to talk to Frieda first to convince her to do it but couldn't since that "King's will" manifested and then he has no choice but to transform and then rest plays out like we've previously seen.