The SR-71 Blackbird needed to fly above Mach 3, producing temperatures beyond 500°F that made conventional aluminum unsuitable. Engineers turned to titanium, which could withstand the extreme heat while keeping the aircraft light enough for high-speed operations.
Around 85% of the Blackbird’s airframe was made from titanium, creating an unusual challenge because the United States had limited supplies while the Soviet Union was one of the world’s major titanium exporters.
According to former Lockheed Skunk Works chief Ben Rich, the CIA used third parties and front companies to secretly acquire Soviet titanium through other countries. Some accounts say the material was purchased under cover stories designed to conceal its intended use.
The titanium ultimately became part of the 32 SR-71 Blackbirds and the earlier Lockheed A-12, the CIA’s single-seat reconnaissance aircraft. The A-12 was also constructed using titanium and was designed for high-altitude intelligence missions.
The aircraft later flew missions over areas defended by Soviet-designed aircraft and missiles. Despite repeated attempts to intercept the Blackbird during its operational career, no SR-71 was shot down by enemy fire.
Today, one of the A-12 aircraft is preserved at the California Science Center in Los Angeles, offering a look at the remarkable engineering behind one of the Cold War era’s most advanced reconnaissance aircraft.
