Samsung spent plenty of time at launch talking about Flex Titanium on the Galaxy Z Fold8. The company described a dual-layer shield of titanium alloy film and plate sitting right behind the main folding screen, thin enough that the film measures about one-third the thickness of a human hair, stiff enough to cut crease depth and raise durability. After Zack Nelson’s durability test showed the inner panel still scratching at Mohs level 2 with deeper marks from a fingernail, the obvious next question was whether any of that titanium actually existed.