The airplane is 92% Titanium inside and out. Back when they were building the airplane the United States didn’t have the ore supplies – an ore called rutile ore. It’s a very sandy soil and it’s only found in very few parts of the world. The major supplier of the ore was the USSR. Working through Third World countries and bogus operations, they were able to get the rutile ore shipped to the United States to build the SR-71.
—Colonel Rich Graham, SR-71 pilot, describing the acquisition process for obtaining the much-needed Titanium.

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