By comparison, since the 1912 sinking occurred slowly, there is probably 99% of its contents left intact. Albeit rusted and decayed over the century. The Titan contents are virtually gone in the flash.
Not gone at all. Splintered into a lot of small pieces because that is how carbon fibre fails, but it’s all still there. But the material deformation while huge on an engineering scale is negligible on an atomic scale. Atomic bonds are a lot stronger than that. For instance diamonds are used to compress things to many orders of magnitude greater than the pressure [e.g. megabars] at the bottom of the ocean [one kilobar]. If you are not careful in executing the experiment the diamond will crack costing you a diamond that you need to buy for the next experiment.