"Anodized aluminum and titanium don't rust - and if by whatever means you DO allow them to oxidize, the oxygen-bound outer layer forms a protective barrier agai

"Anodized aluminum and titanium don't rust - and if by whatever means you DO allow them to oxidize, the oxygen-bound outer layer forms a protective barrier against further rusting." So what? But they do melt. And you can't eat Titanium or Aluminum. We would starve to dead soon without Pt/Rh