IIRC the problem with the Titanic is that they didn't ram the iceberg.

They tried to steer around it and were ripped open like a tin can.

The Titanic was designed to hit icebergs head on and stay afloat.

I guess the Captain figured he new better and didn't want to subject the passengers to a sudden stop.

I also heard that the steel used to build the Titanic suffered from something we now know as the brittle-ductile transition. Basically as the steel gets colder it becomes more brittle and less ductile (it breaks instead of bending) and it was pretty cold that night with icebergs floating around.