> Titanium is in theory much better, but is incredibly difficult to work with(requiring forgings in most cases, and being almost unmachinable), and very expensive as the bond it forms with oxygen is so strong the normal fluorine based processing used with Aluminum won’t work. Yeah, you read that right.
I have a spoon bought from Amazon which they claim is made from titanium. [Lockheed_SR-71_Blackbird](https://en.wikipedia.org/wiki/Lockheed_SR-71_Blackbird) claims 31 aircraft made from titanium and first flew in 1964. Given they got it off the ground in 1964 and can make a spoon in 2022 what kind of machining problems are left to solve for titanium? Usually it's the other way round like make s spoon from wood for 5,000 years then make an aircraft in 1905.