I'd be very interested in this. Aluminium and Steel SSF cases I have or have lined up, so with a Titanium case the only boxes I'd have left to tick for desired exotic materials are Tungsten (can't really see that happening due to manufacturing difficulty) and ceramic (dimensionality issues with any reasonable cost manufacturing process).
Can/is aerospace/marine/medical grade 9 titanium finished with a coating? Polished maybe...What sort of finish would the case have? A Nitride hard coating (straight, or doped with Carbon or Aluminium) would be something really special, but it might be tricky finding someone to coat an object that large.