Corrosion: wearing away of material especially by chemical action.

UNESCO: L O S S A R Y

And the strength, lightness, high melting point and ability to resist corrosion of titanium make it an ideal material for building aircraft parts, supercars and medical implants but it can cost 50 times as much as steel.

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Maillechort is more practical in that it is far more resistant to corrosion, but it is also a much more demanding material to work with, as it scratches easily and stains even more so if mishandled during assembly.

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