They don't usually catch metal knives, much less ceramic ones. I used to (post-9/11, pre-pandemic) frequently fly with bags that get used daily, and I often fo

They don't usually catch metal knives, much less ceramic ones. I used to (post-9/11, pre-pandemic) frequently fly with bags that get used daily, and I often forgot about fairly large flip-blades rolling around in the bottom. Several times, I had to surrender them to the TSA before a return flight, but usually I'd find them when I got back, and they never caught one on the first try IME. So your odds of getting a big metal knife through are likely better than 50/50, and there didn't seem to be any penalty for getting caught. Why bother with fancy materials?