Bike porn

fc9k Youngs modulus tells you nothing in this case, you need vickers hardness:

I was going to hunt down Vickers or Rockwell numbers but couldn't be bothered and I have Youngs modulus numbers on my hard drive, but I wouldn't say it tells us nothing as it says something about the behavior of ti-nitride v titanium under load - and we are talking about a drive chain.

But, yes, you are right it is not the best indicator of 'hardness'.

fc9k Titanium is not a 'hard' material. Joe Bloggs usually doesn't make any distinction between tensile strength, fracture toughness, hardness and youngs modulus though and thinks Ti is better than anything else

Harder than aluminium alloy and lighter than steel, which in the bicycle parts world is a reasonable compromise.

P.S those Boone Ti chain rings are very classy !