Very nice question! Mechanical alloying depends on a lot of factors. The milling time is just one. Both metals are quite tough, so particle deformation/rupture is quite difficult. Does the powder stick to the wall? In this situation the milling time does not matter, the milling is not efficient. As a solution, a liquid medium must be used. The ball / powder ratio must be high (at least 4: 1). The impact energy of the beads must be quite high (see one of my research). What kind of balls did you use? Beware of titanium oxidation.

I hope I gave you some ideas to improve your research. We are waiting for good news from you.

yes I’ve noticed some powder was stuck on the wall for dried process..I’ve tried both dried and liquid(ethanol) media for milling..yet the problem is still on..also for the oxidation problem I use Argon inert gas during process..Now Im considering toluene media cause I’ve come across an article claims that Oxygen inside toluene transfers to the alloy..and since I use 250 ml mill jar , I set ball to powder ratio 3:1..should I increase it ? My milling balls are WC..

OK, I understand. I think the 3: 1 ratio is a bit too close, it needs to be enlarged. What size are the balls? I hope it approaches 10 mm, to have enough impact energy. And you can extend the grinding time, 8 hours is not much.

yes the balls are 10 mm sized, I'm considering 10-15-20 hours to see the difference but I'm not sure about the media. Should I pick Toluene for this ? Do you have any suggestion besides Ethanol?

Thank you