User blog comment:Matt Hadick/Ultimate Robot Battle Round 5/@comment-11132490-20130703194015/@comment-4738647-20130703213542

Luna Titanium Alloy vs what? No one knows what Optimus is made of so you can't say such things, what we do know is; it does withstand the vacuum of space, can survive 4 million years without decomposing/rusting and survive a volcanic erruption.