Titanium gold

In metallurgy, titanium gold refers to an alloy consisting of titanium and gold. Such alloys are used in dentistry, ceramics and jewelry. Like many other alloys, titanium gold alloys have a higher yield strength, tensile strength, hardness, and magnetism than either of its constituent metals.
In July 2016, researchers led by Emilia Morosan at Rice University discovered that a titanium-gold alloy, β-Ti₃Au, is an intermetallic alloy that is up to 4 times harder than pure titanium and most steels.

In popular culture

In the 2008 film Iron Man, the title character wears an armor made from a titanium-gold alloy. According to actor Robert Downey Jr., who played the role of Iron Man, the suit fit him "like a gold-titanium glove".
In the 2019 book The Secret Commonwealth, the alethiometer is revealed to be made primarily of a titanium-gold alloy.
In S6:E22 of The Blacklist the show's computer wizz, Aram Mojtabai, comments that the cage originally created to house Reddington is made of titanium gold alloy.