When is the earliest in Earth history when Grade 5 Titanium alloy could be made, assuming one knows the formula and has the feedstock?
Bob the time traveler has a problem. He went to 75,000,000 BC to get some dinosaur eggs (don't ask) and his time machine re-combobulator broke and a big chunk is missing.
Fortunately he can still make one jump forward in time, but he can't go as far as the XXIV century (his home era). Mostly he could land somewhere before the XX century.
He needs grade 5 titanium alloy to repair the re-combobulator. He just needs to smelt the alloy and his time machine nanites will do the rest.
The further forward he jumps, the biggest the risk of vanishing in the timestream, so he wants to jump the least possible
Consulting his encyclopedia of technology, he tried to figure out when is the earliest in history he can jump to where Titanium alloy grade 5 could be made with the technology available.
He can set his arrival anywhere on Earth. He also has no diplomatic or monetary problems. He can mine the resources or has the raw ores in storage.
P.S.: The story is just to illustrate the case in point. The question's title is all that matters. That is why there is no time-travel in this question.
This post was sourced from https://worldbuilding.stackexchange.com/q/156360. It is licensed under CC BY-SA 4.0.
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