I'm not an engineer... but I taught pre-engineering courses for most of twenty years. Of course, that has nothing to do with my lock likes. I also like cats, and that has about as much bearing on my knife selection! I do appreciate well designed and executed knives.
Lockbacks, a la the Buck 110, which I had considered a standard of comparison, were my favorites for years. Seven years ago, I joined the Kershaw crowd - liner lock AO examples, like the Scallion, Blur, & Leek worked perfectly - never broke even an AO spring. After much use, battered and misguided sharpening attempts later, they are all still functional. Then - Benchmade AXIS lock - another bullet proof design. Never a failure, either. Somewhere in time, the frame lock appeared - wow. My first, a BM 630 Skirmish, deserved a really big wow! Many more followed.
A properly made Ti framelock is a work of techno-art. If you want to be really spoiled - especially price-wise - get a blemished JYDII in Ti/SG2. Unreal quality... just don't expect to beat it for less than several times what it cost. I do prefer all-Ti handled framelocks, like my BM's, Buck 172 Mayo TNT, Kershaw JYDII's, and CRK Umnumzaan. Some part-G10-ers, like my BM 755, ZT-301, & Boker Haddock, etc, are tough acts to follow. Sadly, ask me which I like best, AXIS, framelock, or lockback, and I'll state an unequivocal "Yes!".
Stainz