What Is Titanium?

Where is titanium on the periodic table?

Titanium has atomic number 22, the symbol Ti, and sits in group 4 of the periodic table among the transition metals. Its atomic mass is about 47.9. Five stable isotopes exist, with Ti-48 being most common at 73.7%. Titanium was discovered in 1791 by English clergyman William Gregor, who found it in black sand from a Cornwall beach. The name comes from the Titans of Greek mythology. Titanium is the ninth most abundant element in Earth's crust at 0.66%, but extracting pure metal is technically difficult and costly because titanium reacts strongly with oxygen and nitrogen at high temperatures.

What are the properties of titanium?

Titanium has a density of 4.5 g/cm³, about 60% of steel's density, while having comparable tensile strength to many steels. The melting point is 1,668°C, much higher than steel's 1,375°C. Pure titanium is malleable and ductile, though most engineering uses involve titanium alloys for additional strength. The metal forms a thin, hard, transparent oxide layer that protects it from further corrosion in air, seawater, and most chemicals. Titanium is paramagnetic and a relatively poor electrical conductor. It's also biologically inert, which makes it ideal for medical implants.

What is titanium used for?

Aerospace applications dominate titanium use, with aircraft engines, airframes, and spacecraft using titanium alloys where strength-to-weight ratio is critical. Medical implants including hip and knee replacements, dental implants, and surgical hardware use titanium because the body doesn't reject it. Chemical processing equipment, seawater desalination plants, and offshore drilling platforms use titanium for corrosion resistance. High-end consumer products like premium bicycles, golf clubs, eyeglasses, watches, and laptop bodies use titanium for its combination of light weight and durability.

Why is titanium so expensive?

Titanium ores are abundant, but extracting pure titanium metal is expensive because the element reacts strongly with oxygen and other gases at high temperatures. The Kroll process, developed in the 1940s, is still the main industrial method but requires multiple energy-intensive steps. Newer methods are being developed but haven't fully displaced Kroll. The result is that titanium costs roughly 10 to 30 times more per pound than steel, restricting its use to applications where its unique properties justify the cost. Recycling titanium scrap has become economically important as a result.