the Alfa-class boats could only achieve around 12 knots. It should be noted that the Soviet's experimental nuclear-powered cruise missile submarine K-222 reached a submerged speed of 44.7 knots ...

Russia’s Alfa-class submarine, with its unique titanium hull ... to outmatch anything that was in the known Western arsenal. Speed and diving capabilities were the sine qua non of this ...

During the Cold War, the Soviet Union saw the benefits of building submarines with titanium and designed its Lira-class (NATO designation "Alfa") using ... subs to match the speed and depth ...