How do submarines withstand deep sea pressure?
To gain a tactical advantage, the Russian Navy built some of their boats with titanium pressure hulls. These hulls were designed to allow greater operating depths, and, therefore, increased ability to “hide” beneath the sea. But as is the case with the steel hulls, the titanium hulls used the geometry (shape) and the mechanical strength of the pressure hull and all the fittings to keep the water out at test depth.
