Donald; I had much the same experience with a Boye dendritic Co folder. Or, more precisely, Steve Harvey did. He was making radial cuts in the bottom of a large soft drink bottle when the middle of the edge bent slightly (so slightly that my old eyes could barely see it, but Harv could easily see it). We then tested some Talonite (r) knives:
We took a Darrel Ralph custom knife, much like an Apogee, and started making radial cuts as before. A section of the edge, about an inch long and 1/16" wide actually tore right out. Harv was apalled, as it was my new knife, but I was delighted to finally have some good test data. Darrel was, at the time, new to Talonite blade grinding, and had made the edge too thin (Harv even remarked at the time how thin the blade edge was). I returned the knife to Darrel, and he ground a new blade with a different profile, which has performed flawlessly since.
A few minutes after the failure of the Darrel Ralph blade, I took my Kit Carson #18 folder (Harv declined to try it out, I wonder why?

), and proceeded to cut through every plastic bottle in sight, then switched to plastic flower pots, with grit and dirt still in the bottoms. No problems at all.
My daughter (the same one that got the Talonite chef's knife and the Talonite paring knife) sweet talked me out of my Rob Simonich Wambli with fossil mammoth ivory scales; she has used the knife for everything, including wallpapering, and it has performed absolutely perfectly. There is a natural lubricity to Talonite. My daughter has noted a marked difference cutting through meat with her Talonite blades as compared with her steel blades.
These data indicate what I have said before: the ductility of Talonite is not a problem with blade performance if the blade geometry is correct for the alloy. Knifesmiths are familiar with the alloy by now, and they now utilize correct geometry, so you really shouldn't worry.
Bladezealot/Russ: GREAT LINK to a great thread. I had forgotten that Talonite: Good, Bad or Ugly had ran to 17 pages!!! Just one thing. I am a cat person, and your ball peen hammer has always struck me as being funny. Would you consider losing that Lactrodectus mactans that comes down in your avatar, however? I am afraid that some night in a somewhat altered state, I might put a 230 gr. bullet through my monitor! Way too creepy!!
Also, THE definitive website regarding Talonite and other Co alloys is Marion David Poffs' excellent one:
Tom; you are a generous gentlemen indeed. Giving Marsot a Talonite neck knife is a marvelous gesture of international goodwill. My compliments.
If you are wondering about a scarcity of Talonite (just a rumor) it is because Will Fennell has a huge warehouse stocked with Talonite web (the stuff left over when you stamp out blades).

My modest (only a dozen or so, honest) collection of Talonite knives has nothing to do with any imaginary scarcity. Really.
Still whacko (and was before I was exposed to cobalt) Walt