History of titanium

A Brief History
Titanium was first discovered in 1791 by British chemist Reverend William Gregor, and was originally named Gregorite after its founder. In 1793 it was once again discovered —independently—by German chemist M.H. Klaproth. .....

List of ASTM grade

ASTM Grade	Description
1	Unalloyed Titanium - Low Oxygen
2	Unalloyed Titanium - Standard Oxygen
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Titanium’s quality

Titanium Grade 1-4 is pure Titanium, the other grades are alloys. Pure Titanium is used due to its high corrosion resistance, the alloys because of the extremely high strength to weight ratio. ......