Promate Titanium Knife?

  • Hey guys, looking to get a knife and was told titanium is the only way to go for longevity. I bought a stainless steel knife while i was in Florida for a few days, and it rusted after 1 dive. Even after the dive i completely took it apart, soaked in freshwater and then the next day it was covered. But, i found these Promates on sale for $50 instead of $90 and was not willing to pass up such a good deal. Anyone use these? They pretty good? Thanks

  • Hey guys, looking to get a knife and was told titanium is the only way to go for longevity. I bought a stainless steel knife while i was in Florida for a few days, and it rusted after 1 dive. Even after the dive i completely took it apart, soaked in freshwater and then the next day it was covered. But, i found these Promates on sale for $50 instead of $90 and was not willing to pass up such a good deal. Anyone use these? They pretty good? Thanks


    Can it cut SS cable that I some times use?


    Cheers, Don

    "Great mother ocean brought forth all life, it is my eternal home'' Don Berry from Blue Water Hunters.


    Spearfishing Store the freediving and spearfishing equipment specialists.

  • The Promate titanium knives look like scuba knives, too bulky for freedive spearfishing and not purpose made for dispatching fish. For this you want a stiletto type blade.


    I Never had a rust problem with a few stainless steel knives of different brands. I don't even rinse my knife so I get a little surface rust, which can come off with some polishing, but it doesn't affect the functionality so I don't bother. A few good stainless steel knives under $50 here Spearfishing Knife


    I never used a titanium knife, never felt the need to experiment when a stainless steel knife does the job fine. Discussion about titanium for blade material here best blade material, hi carbon steel or titanium?. The consensus is that titanium is too sbrittle. One of my uses for a spearfishing knife is chipping the reef to dislodge a stuck shaft, you need a stiff blade for that, titanium may break.


  • I Never had a rust problem with a few stainless steel knives of different brands. I don't even rinse my knife so I get a little surface rust, which can come off with some polishing, but it doesn't affect the functionality so I don't bother. A few good stainless steel knives under $50 here Spearfishing Knife


    I don't wash my weight belt (with knife) either. It's quite ugly to look at. However, I always wondered whether the rust affects the taste of the fish in some way or the other.

  • The Promate titanium knives look like scuba knives, too bulky for freedive spearfishing and not purpose made for dispatching fish. For this you want a stiletto type blade.


    I Never had a rust problem with a few stainless steel knives of different brands. I don't even rinse my knife so I get a little surface rust, which can come off with some polishing, but it doesn't affect the functionality so I don't bother. A few good stainless steel knives under $50 here Spearfishing Knife


    I never used a titanium knife, never felt the need to experiment when a stainless steel knife does the job fine. Discussion about titanium for blade material here best blade material, hi carbon steel or titanium?. The consensus is that titanium is too brittle. One of my uses for a spearfishing knife is chipping the reef to dislodge a stuck shaft, you need a stiff blade for that, titanium may break.


    Yes and no.


    Titanium is the only option that won't rust. Any of the stainless steels will rust under the right conditions or neglect. The hardness softness discussion in the above forum has nothing to do with the blade bending. Titanium is stronger than steel and will take more force to permanently bend. When they are discussing softness they are referring to the blades ability to hold an edge. A harder material will stay sharper longer and will be able to scratch more materials.


    If you took a plate of steel and tried to scratch it with the edge of a titanium knife you wouldn't be able to. You would see a thin line of titanium deposited on the plate of steel. If you did the opposite test (titanium plate, steel knife) you would find a thin scratch in the titanium plate.


    To answer your question Don, while you may be able to break the steel cable with a titanium knife it will be very difficult. The titanium isn't actually cutting but if you put enough force on a very small point you can break the cable. For regular fishing lines that most will encounter titanium is sufficient to cut but if you know there will be steel cable you need a steel knife.


    Also, high quality, high strength, titanium is expensive. Much more expensive than steel. There are cheaper grades of titanium but they do not provide the same strength and are often not much stronger than steel but still lighter and softer. If the titanium knife is cheap I would be weary of this.

  • I use the wenoka ez lock titanium and love it. I'm on my second one after loosing the first. Like stated above it doesn't hold an edge very well but it still works fine for killing fish and cutting line. Iv used it to cut 400lb mono from the rocks with no problems to get my shaft back.

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