Not quite. They use titanium blunts specifically BECAUSE when the swords clash they throw dramatic sparks, as well as it being easier to perform flashy choreographed fights with a light weight long blade.
Medieval Times was sued when a flaming piece of titanium hit an onlooker in the eye, blinding it. I don't know if he won the case.
-- Medieval Times has been named in a lawsuit claiming millions of dollars in damages as a result of a man on his honeymoon becoming partially blinded in one eye while attending Medieval Times Dinner & Tournament Restaurant in Buena Park.
www.lawyersandsettlements.com
Newlywed Couple's Horror At Medieval Times Dinner
www.huffpost.com
As for stainless steel swords, I don't know how or which steel would be the one to use. All I can say is that when it comes to handling sword strikes, the material must be tough of course, and springy flexibility is good, a lot of which comes from how the sword is shaped. The often overlooked important thing to consider is shock loads - spikes of force. Although instantaneous in duration, this type of force can overwhelm materials that lack resilience and easily push them beyond a yielding point. Steel can be tough, even springy, and yet not have high resilience. A stainless steel sword would need to show high resilience. I'm not very well-read in cutlery steel, so I wouldn't be surprised if more than one worked.
The modulus of resilience is the amount of strain energy per unit volume (i.e., strain energy density) that a material can absorb without permanent
www.engineeringchoice.com