B. Collision With Seafloor Destroyed Titan?

On June 26, 2023 I looked at "A. Mixture of Pressure Hull Materials Failed Titan?" in a spontaneous way. 

My alternate "B." way of thinking is that:

-  after an event happened while descending
-  like fire, perhaps with rapid gas release (too fast for the crew to put on their respirators) 
-  causing major interruption to steering
-  caused Titan to hit the seafloor
-  almost instantly distorting Titan's pressure hull
-  in turn causing the USN recorded implosion.  

Large portions of Titan are being retrieved from the seafloor in record time. These and smaller bits of Titan and even the remains of the 5 crew, may reveal why Titan failed. 

Under theory B. the cause might originate from battery management failure (especially from more fire prone Lithium-ion batteries) causing fire might be discernable due to burn marks on Titan parts and sadly on human material.

But as this video here (from 2:05 to 3:15) illustrates the beginning of compression of air (similar to a diesel piston) can cause sparking, fire and explosion in just a few milliseconds. At almost the same instant implosion of a submersible is proceeding. A few milliseconds later another explosion “pushes out” the implosion, scattering a submersible’s bits over a relatively wide area. This implosion-then-explosion was presumably the one event heard by the USN IUSS seafloor sensors.

All this complicates the job of examiners studying a Titan fire line of enquiry.

However, if enough battery material can be recovered, a study of its eventual chemical state and other Titan parts might reveal whether fire was caused by:

-  a runaway battery heat buildup and/or
-  a spark igniting a release of battery gas, or
-  igniting Titan's oxygen rich environment

all preceding Titan hitting the seafloor and then almost instant implosion. 

The carbon fiber (for all its possible technical pressure hull failure faults) might also be useful in revealing any prior melting that was different from any burn marks of flash caused be implosion. 

Yet, contrary to the hitting the seafloor theory - it is puzzling that such Large parts (like the part below) have been recovered rather than being imploded-exploded into tiny pieces. This may suggest a less rapid implosion occurred near the surface, say 500 meters down - and then the pieces sank to the seafloor. That would be more in line with theory A. Mixture of Pressure Hull Materials Failed Titan?" in a spontaneous way.

So this whole issue remains a contradictory intellectual challenge, that sadly involves loss of life.