Ok how to get two peices of the same metal together?

Question

name says it all, no idea how im going to do it, but im making a cap opening ring, and i just need to know how to this part

Answer 1

weld it together

Answer 2

There are many methods of getting two pieces of metal together. If we knew a little more of what type of metal you are using and what size thickness. Will there be heavy loads applied?

Mechanical fastening, screws, Riveting, soldering, brazing , welding,  gluing, hammer welding.,