Titanium is passivated by oxidizers (conc sulfuric acid is the exception), so bleach shouldn't do anything other than tarnish it. HPA probably wouldn't dissolve titanium. But sulfuric acid, dilute or concentrated, will dissolve it, especially under heating. HCl will also dissolve titanium, especially when hot. HF of any concentration (even 1%) will rapidly dissolve titanium whether oxidizers are present or not.
Platinum and gold shouldn't react with bleach. Unless you add HCl, then gold will dissolve. Tantalum, I'm not sure. I don't think it would react at all with bleach. I'm suddenly wondering if tungsten will, though.
How would commercially pure titanium fare here ?
Titanium is passivated by oxidizers (conc sulfuric acid is the exception), so bleach shouldn't do anything other than tarnish it.
HPA probably wouldn't dissolve titanium. But sulfuric acid, dilute or concentrated, will dissolve it, especially under heating.
HCl will also dissolve titanium, especially when hot. HF of any concentration (even 1%) will rapidly dissolve titanium whether oxidizers are present or not.
How would platinum,gold and tantalum fare here?
Platinum and gold shouldn't react with bleach.
Unless you add HCl, then gold will dissolve.
Tantalum, I'm not sure. I don't think it would react at all with bleach.
I'm suddenly wondering if tungsten will, though.
Osmium is king
Poor rhenium