I have seen guns made from steel, aluminum, plastics and many many many different synthetic resins and such but never have i seen one made out of titanium and tungsten? aside from the cost it seems to me that it would be a great idea to make the main frame and all the internals out of titanium since it is stronger and lighter than steel while also being resistant to corrosion while making the gas chamber and barrel out of something like tungsten carbine so it could more easily resist more extreme heat and pressure allowing for massively over pressurized rounds to be fired.while I am sure there is a reason this hasn't been done aside from the price but for the life of me I cant think of what that reason would be.and for those of you who I am sure will be thinking it is about price consider that gold plated desert eagle handguns are sold for over 3000$ and those are useless, but yet they still manage to sell.
I will agree with oil field that it is engineering; defining the best material and manufacturing processes to achieve the design goalsJust because titanium and tungsten carbide are famous materials doesn't make them better choices for firearmsTitanium is typically used in sheet form to reduce weight of structures compared to aluminumTungsten carbide is typically a coating applied for wear or thermal resistanceNot being a firearm manufacturer myself, I cannot say for sure why these materials haven't been used in firearms, other than they offer no advantage to other materials that are more available at lower cost.
