Now you dont say what grade of titanium your using. Thats the 1st
thing we should to know.
Ive tried the V6A4 alloy but find that the commercially pure is by
far the best to use for jewellery making. So finishing? what you use
as buffing wheels depends on the turned form of the ring. if its
curved both in and out in section then most normal jewwellery wheels
will do, however, if the final turned form is with flats and sharp
edges then to a void wearing these away in the finishing process you
have to use hard felt wheels as the supporting medium for the
compound. stitched cotton is a good wheel to start with.
Next 3500 rpm is fine up to 3in in dia, but on a 6in wheel, you need
1500 rpm. Then a parallel shaft is not easy to use as your changing
wheels every 5 mins. you will need an adapter that has the same
internal dia as the motor shaft and there locked together with small
allen screws that do not protrude above the adapter.
Next you need a 3M compressed scotchbrite wheel thats part no 18762
DB/wl EXL. 6in by 1 in with a 1in parallel internal bore. youll need
to press in a tapered hole insert to use on the tapered adapter.
This has a grit size 9sfn. Regret 3M dont say what the actual grit
size is, tho mine here is 1000 mesh. Thats The only grit that
actually cuts titanium.
It could be silicon carbide, if not then its ali oxide. the former
is better. Titanium is a funny stuff to finish, as you have found
out. Next I use a white silica compound called Highfin, you need to
find an equivalent.
Next rouge is not needed at all. a green chrome oxide will finish
your rings best.
Thats the outside, Next the inside. Use a tapered soft pine broom
handle 12in long from the 6in mark taper it down to 1/2 in.
Put compound on the wood and get the wheel to spin the ring on the
wood. use a different piece of wood for each compound.
If you can make an adapter to hold the ring in your 3 jaw chuck then
a likewise tapered piece of wood with wet and dry glued to it will
help finish the inside before polishing. When youve got that far get
back here and update us how you find polishing titaniun, its not