The Soviet Union once thought it had an edge over the United States in undersea warfare during the height of the Cold War. The Russians designed their Lira-class boats with titanium hulls that would allow the submarines to be better propelled and dive faster, deeper, and quieter. They could maybe even outfox incoming American and NATO torpedoes. The U.S. […] The post Why the U.S. Navy Never Built ‘Deep Diving’ Titanium Submarines Like Russia app…