When everything is designed, manufactured and tested perfectly, you’ve got a shape close enough to perfection that can withstand the overall pressure being applied from all directions. In this scenario, the material can “breathe” – shrink and expand as needed with depth. The Titan’s implosion means this was not happening.
The implosion itself would have killed everyone within less than 20 milliseconds. In fact, the human brain can’t even process information at this speed. As much as the news is devastating, perhaps it is somewhat reassuring the Titan’s passengers would not have suffered a terrifying and drawn-out end.