Titanium and Titanium Alloy
摘要
Next to aluminum, iron and magnesium, titanium (Ti) ranks the forth most abundant structural metal in the Earth’s crust, the content of which is about 0.6%. In 1791, the British mineralogist–William Gregor, was the first to discover titanium. Countries around the world have continued to study and improve titanium extraction methods for more than a century since then.