[user104658]

Originally Posted by Cherie

The nose and the landing frame of Titan are part of the debris field found

This is actually the best possible news in this scenario if it was a sudden structural failure. The sub was never realistically recoverable and of all outcomes, a quick and painless death is far preferable to the alternative. Pressure at that depth is so high that they probably wouldn't even have known that it went wrong. They'd have been dead in less than a second.