the titanic did not sink of hitting an iceberg it has been said if they hit it straight on the titanic would be here today.So what difference would it be if it hit the side.Well upon hitting the ice berg the berg had struck the midsection expansion joint causing surface hull failure an as it filled with water from the compartments it put more an more stress on the expansion joints causing the ship to break in 2.

http://www.memagazine.org/backissues/membersonly/aug98/features/titanic/titanic.html