There are some good titanium blades that use metal matrix composite edges.
Here's my neck knife - it nips braid, and won't randomly cut your finger
Wear on the matrix edge exposes microscopic carbo-nitride shark teeth. Totally salt impervious.
They also make utility skinners, folders and dive knives using this technology.
Atomic Aquatics titanium blade made the top of the list in this Scuba mag reviewhttps://www.scubadiving.com/15-brand-ne ... y-scubalab
Don't expect titanium blades to behave like steel (see metal matrix composite edge above). You can't cut your finger with these knives unless you try.
If you try to give it a honed edge matching steel in normally hard head, you destroy it.
I have a killer titanium self-sharpening fillet using the same technology - it makes short work of redfish ribs, but isn't sharp enough for skinning specs, so I use my sharp KOF for skinning fillets.
Spyderco H-1 is the only long-term salt-resistant high-hardness stainless. I have the first model Spyderco Salt, 20 years old now, and always in the kayak.
Spydero H-1 Salt was the number one knife in the Scuba mag reviews I linked above.
I'm a metallurgist and PE, and have seen a lot of my well-cared knives give up in the salt, nitride-coated CRKT, and a Benchmade fillet to name a couple (the Benchmade actually gave up in freshwater, from exposure to fish blood, even with instant washing).
Also have this Kiko Matsuda Nickel+VG-10 damascus - the folding and hand-forging diffused enough nickel into the VG-10 layers it's salt-impervious, holds an incredible edge (slices like a razor blade). But damn, if I dropped it, could never replace it.