Titanium on today's Moment of Science.
With 22 as its atomic number and 'T-i" as its atomic symbol, titanium is the fourth most abundant metal on earth. When mixed with other metals such as aluminum and vanadium, titanium is as strong as steel but weighs almost half as much. Besides being used for making bikes and golf clubs, most conventional military aircraft is also made out of titanium.
Since a lot of fighter planes are at sea on aircraft carriers, titanium is useful because it doesn't corrode or rust in salt water. And unlike aluminum, titanium can withstand the considerable surface temperatures that result from the air friction when fighter jets fly at high speeds.