IIRC, the ship sank after iceberg tore open four sections of compartment.
So, there was that damage plus any subsequent damage. Might not be possible
to raise the wreck in one piece. IIRC, the stern sank first, due to weight
of the engines.
It's a fun idea, to consider raising the wreck, and see what can be found.
Christopher A. Young
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Not to mention that the stern section hit the sea bed props-first at a
high speed, with most of the deck and hull plating peeling off.
As it happens, I've got a copy of the book of Raise the Titanic in the
van which I got from a junk store a couple of months ago, having spotted
it and remembered seeing the movie when I was a kid - I hadn't even
realized then that the 100yr anniversary was coming up. The wreck wasn't
discovered until five years after the movie (and eight years after the
book), so I suppose the movie makers can be forgiven a bit of Hollywood
 unless you buy into the potential discovery by the Royal Navy in
1977, but I think the exact details of that aren't due to be declassified
for a few decades...