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There are several differences between Stainless Steel and Titanium dive knives. The first and most obvious being that one is made from some grade of stainless steel and the other is made of titanium.
Stainless steel knives get their name from the low grade of the material they are made from. The stainless steel helps prevent corrosion but unfortunately to make the knife strong an amount of carbon is added to the alloy.
Titanium dive knives won’t rust like their steel counterparts, and in general, hold an edge much better. They are much lighter in weight but equally as strong and for this reason alone, they are often one of the more attractive choices for a diver.
There are several important features to either knife that the diver should look for. On the blade, it is very important for the knife to have a serrated edge. Another important feature is a line cutter. Finally a handy feature is a tank banger on the butt end of the knife. It can assist with signaling of a dive buddy and works as a great attention getter during a dive.