Come now, the Titan should never have been built, the primary cause of loss was the carbon fiber laminate which is simply the wrong material for a submersible.

Come now, the Titan should never have been built, the primary cause of loss was the carbon fiber laminate which is simply the wrong material for a submersible. This is not hindsight, there's a five year old terse answer on Quora of all places stating this: https://www.quora.com/Is-it-feasible-to-build-submarine-hulls-out-of-carbon-fiber-It-is-stronger-than-steel-per-weight-and-it-doesn-t-rust-Might-it-also-be-harder-to-detect-with-sonar/answer/Pierre-Smith-17 https://www.quora.com/Is-it-feasible-to-build-submarine-hull... and again three years ago https://www.quora.com/Why-isnt-the-military-navy-using-carbon-fiber-in-the-ships-It-costs-less-and-it-s-stronger/answer/Mike-Miller-117 https://www.quora.com/Why-isnt-the-military-navy-using-carbo... > Carbon fiber’s compression strength is poor. Its shear strength is low. It doesn’t dent; it either splinters or returns to shape and hides severe damage in the laminate.