Hello aspirant,

Hope you are doing well. After completing your BTech in metallurgy you can either go for Mtech or MS or MBA as for doing PhD you need to complete your Mtech/MS first. So you can do your MS in metallurgy as yes it would have scope in future.

So you can go for it. Also you can go for any other branches (field)  in MS if you want to.

Hope this helps

If any queries feel free to ask

All the best!!

Regards