i honestly don't know the propertis of the tungsten/ceramic ring. i don't know if it permanently plastically deforms or not.. either way, I 'presume' ( may be wrong there
) that SOMETHING can cut it.. even if be wear, ie.. a carbide abrasive blade.. or perhaps a diamond blade. i do believe the ring cutter i saw had a small diamond wheel.. either way.. i'd hate to have to hand spin that wheel to get thru a tough material.. might take forever.
I have 2 wedding bands.. 1 for work, 1 for normal use. my 'work band is a 10k, thus 'harder and more durable one'... it's from my 1st marriage. i wear it in places where it might be damaged... but the wife pretty much wants me ' identified' full time.
I did get a temporary reprieve when i hurt my hand a while back and had to go ringless while it healed.. but not long..