Metal, watch material
Titanium is used more and more for watch cases, especially for watches with a modern appearance. Titanium is nickel-free and thus hypoallergenic — this is a big advantage for people with allergies.
Titanium is completely air-stable and excels stainless steel in its corrosion resistance. Significant deposits of titanium-bearing rocks are found in Australia, Canada, Norway, South Africa, and the United States.