Not that I'm taking this obvious satire seriously, but:
The "metal" used on the Titanic was inferior. At low temperatures it was extremely brittle. It had been exposed to 28 degree water for hours prior to striking the iceberg.
Welding wasn't used in the hull construction, they used rivets. The rivets used on the Titanic were more inferior than the steel. These shattered like glass when stressed, popping the seams open.
Lost fact of the Titanic disaster: The fire in coal bunker #5. They could not put it out, and needed to get to NY as fast as possible in order to get it extinguished. This heat softened the steel all around this bunker, including bulkheads, the hull, everything else. This was the real reason for the extra speed.
As to the idiotic "experiment" proposed in the OP.... Today's hammers are made of far superior steel than that of the Titanic's hull. I give you, the Orpple:
An Orpple is a hybrid, a combination of an apple and an orange. It has a pocket of kool-aid in the middle. It's for folks who just cannot help themselves, and have to compare apples to oranges. Now, you can have both! Enjoy.