"Titanic" film director James Cameron, himself a noted oceanographer who has made more than thirty dives to the wreck site in a submersible, stated:
"The ship hit the bottom approximately at the same speed it was travelling when it hit the iceberg. The bow did not accordion. The ship's structure failed 200 or so feet aft, in front of the bridge. If the ship struck dead on, it would have failed at the same point, right in front of the bridge, and it would have sunk in less than 15 minutes, like the Lusitania, killing almost everyone."
(Titanic-James Cameron's Illustrated Screenplay; by James Cameron, Harper Collins, 1997.)
I have taken this from my forthcoming book, which I have included a link below;
Please forgive my shameless self-promotion!