Bringing titanium alloy in luggage?

Bringing titanium alloy in luggage? - Close Up Photo of Gray Metal Pipes

So my friend is traveling at Phoenix, AZ, USA. And I'm wondering can he bring grade 5 titanium alloy back to Taiwan without any additional process? Like putting a grade 5 titanium alloy right in the luggage, is it legal doing this? Not for commercial but just bringing a small alloy for personal crafting?

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