@Kami_Nana
That's why it's a metal alloy that he used. Beta titanium alloy isn't the same as just pure titanium
Titanium is shit regardless of the alloy for knives. You have the issue of vanadium carbide tear-out with steel, for fuck's sake, which has much, much higher toughness, hardness and wear resistance than titanium.
Titanium is not an end-all solution. There's a reason why knives and rifling still use steel even if titanium is made for much of the other components. That's because, material science wise, it's just better. Unless, again, you need non-magnetic abilities. Even for advanced corrosion proof (not just resistance), titanium is no longer the best option. Spyderco and... whatever company that made it that I can't remember, introduced nitrogen-based H-1 steel. Which, while still a steel, is no where good as regular stainless/carbon/tool steel but it still beats the pants off any titanium alloy for edge retention. Best part is that it is work-hardened which means sharpening and serrations actually make the steel harder.
But, seriously. Again. Titanium is not a magic bullet. It does serve as the magic solution to material science problems. It is often WORSE than other alternatives... but is one of the best metals for a COMPROMISE. Case in point: Steel would've been a better metallurgic use in the SR-71 to deal with heat and thermal expansion... except that it would've been too heavy to fly, then. Which is why titanium was used. And the only reason it was used. Not because it's magic or better.