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Agreed. The original paper states that they have a technique to remove oxygen from the surface of titanium. If that is the case, grinding could be viable. How hard is it to grind titanium?

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…Very hard. It’s titanium. Every work process has to be done with special carbide bits, at half speed, underwater.

Tungsten carbide isn’t it?

I think the titanium on the outside in the slag is the easy part, and not included in the 1% figure, which is on the inside.

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