A hard silver-grey metal, Titanium is known as a chemical element of atomic number 22. Titanium is used for artificial knee and hip joint because it’s strong. But unexpected discovery by the physicists the gold standard for artificial joint can be improved with the some with the addition of some actual gold with a specific atomic structure that imparts hardness.
One of the extra compound was a mixture of three parts of titanium and one part of gold that had been prepared at high temperature