Just received my Norsborg TiBam handle and am seriously impressed with it. Sort of a Bamboo type design with some serious knurling. Doubt you could lose grip if you tried. This seller seems to have some great handles and stands at pretty reasonable prices for full Titanium in my opinion. Thought I’d pass on my thoughts since I’d never heard much about them. It took about 2.5 weeks for mine to arrive. Bought on EBay. Photos from the listing.
I got their bamboo handle that looks like real bamboo from them a while back. Took forever to get here and it was real massive (4"), but the titanium made it light.
I've got the 'Sample 12' with custom dimensions — after sending them the measurements it didn't even take a full week until they had it done. 12mm diameter, 15mm at the bottom, 85mm total length with extra space for my fingertips at the top. The knurling is outstanding both visually and functionally. It weighs only 36.6g.
I ordered five over the course of a few months and four arrived in about three-ish weeks. For whatever reason, the third was hung up for about two months. Assuming the design works for you, the quality and price can't be beat!