No part of the carbon fiber hull is shown, event attached to the other wreckage, which suggests just about the whole thing shattered instantaneously.
There was a large component that looks like a relatively intact section of the carbon fiber vessel section shrouded in white tarps. That combined with the fact that the removable front spherical dome was separated from the titanium ring flange that bonds to the vessel suggest that the carbon hull may not have imploded. Rather there was a failure of the door or the view port. It is unclear if the view port is still intact from the pics. If there was a failure of the door or view port the rapid ingress of high pressure water would have created a massive internal positive pressure spike inside the vessel and and created a shock wave traveling through the tube which would have rebounding off the back wall of the vessel. Either the rapid increase in a positive internal pressure spike or the shock wave (or the combination of both)failed the adhesive bonded titanium ring joint and failed the bolts holding the spherical front door closure to the bonded titanium locking ring.
If this is the case, the vessel did not actually implode. Instead, perhaps the titanium door and the titanium bonding ring were blown off by the dynamics of the ingress of high pressure water into the vessel caused the adhesive bond on the titanium ring to composite cylinder to fail