Titanium Alloys for a Yo-Yo

6AlV4 is an alpha beta grade and likely the most available grade for your project. Uniformity of weight distribution is not an issue in wrought barstock. It can be solution treated and aged to obtain mechanical properties.

So why do you want to heat treat this yo-yo?

milo

The heat treating is for the sake of strength, a lot of yoyos get a lot of dings from banging of the ground and I want a (as close as possilbe to) ding proof yoyo. Aluminum (even arospace grades) is too ding prone.

"The heat treating is for the sake of strength, a lot of yoyos get a lot of dings from banging of the ground and I want a (as close as possilbe to) ding proof yoyo. Aluminum (even arospace grades) is too ding prone."

Rubber cladding would make it ding proof! Gilding the Florin in reverse, as it were.

there are some rubber claded yoyos but in grind tricks where you actually touch the yoyo the rubber kills the spin. And I need to keep the number of parts to a minimum or it will wobble.

I am the opinion that a Yo-Yo machined from solid titanium bar stock will be pretty hard. It would be difficult to make more than a cosmetic mark on the surface. IF it is surface treated to apply color(s) they would likely show the marks or scaring, but NO DENTS.

Hardness of the oxide and silicaeous materials in the grounds- ie sand and stone and concrete- will scratch even heat treated martensitic steels. Look up mohs hardness or take a metallurgy course. Avoid hard surfaces.

milo

You want light weight or hard surface? Titanium itself is not hard. Its tough and scratch resistant but it's kind of soft so you'll dent it. You can bend titanium rod easily but its not easy to actually break it.

Use a harden steel core and chrome or titanium coat the surface.

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