Some tin cans had the a reinforced bow, with the knife edge for ramming. Some of the cans were done that way during WW II, the Bordelon was that way, and she even had railroad rails welded into the bosun locker.
The bow leading edge was capped with a sheet of high strength steel folded to fit the bow with a sharpened edge.
The USS Strong was that way, and so was the John R Craig, Strong cut a sea-going barge in half, as I was watching, clean cut, just like a saw. The Craig cut over 50 foot straight into a concrete wharf in