Dan

What are the negatives of using Titanium for our applications; knives, trigger mechanisms etc.?

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Alan

cost i would think..

spearstuff

Well this website says....

Titanium Alloys - Wear Resistance

Titanium Alloys - Wear Resistance

The surfaces of titanium and of all commercially produced alloys of titanium have relatively poor wear resistance. In particular, titanium surfaces in contact with each other or with other metals readily gall under conditions of sliding contact or fretting. Even with light loading and little relative movement, complete seizure of surfaces can occur. This situation is caused by adhesive wear in which microscopic asperities on the metal surfaces come into contact as a result of relative sliding and they tend to weld together forming a bond at the junction which can have a rupture strength greater than the strength of the underlying metal. Fracture then takes place at one of the asperities causing metal to be transferred from one surface to the other. The debris so formed gives rise to the accelerated wear that occurs with titanium.

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Daniel Burke

http://www.sturgillspearfishing.com

dustyyoungblood

Very few if any drawbacks.
1. Cost is really the only one.
2. The wearing properties and galling that Daniel mentions above are could be real dangers for mechanisms. However, these problems could be completely eliminated by shot peening and coating/treating. I am not an engineer, but I sat behind one for several years who had decades of experience with Ti. We had these conversations about Ti all the time. I might be wrong, but unless you have high loads, and are sliding at a frequent rate/ long duration, then you should not have any galling problems. It's a speargun mechanism, not an automobile transmission.

For Knives, Most Titanium alloys will not be able to hold an edge very well. You would need to use "Beta C" or another alloy(name escapes me). These can be heat treated to Rockwell Hardness 40c and higher

Don Paul

Back on this topic Tues... I'm doing home work tonight, and the dog ate my slide rule.

Cheers, Don

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chris oak

From my limited experience, titanium does not sharpen well because it's so hard, once my wenoka titanium knife got dull it was almost impossible to sharpen it without using a file.

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Andrewk

Will never buy anything diving related made from titanium or that has titanium in it.... Stainless steel all the way! May be a durable metal but too expensive, all a marketing gimmick by companies in my eyes.

Dan

These guys apparently are making titanium trigger mechs speargun blue water trigger mechanism

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dustyyoungblood

"speargun blue water trigger mechanism"
I was looking at that also. I'd like to see one.

Someone had Ti shafts once I saw online. Now that is interesting. Think of how quickly they would accelerate? But at 3x the cost of SS.

phil herranen

using ti for a trigger is a bad accident waiting to happen .ti is malleable and will shatter like glass under high load impact .it is not a good choice for ,trigger mechs ,or spear tips. it is best used for light weighting motor cycles ,bikes , and airplanes .
phil