Before revision: History In 2016 a paper by MacDonald et al told that the Armstrong powder was produced directly from the reduction of Titanium tetrachloride "in a continuous liquid loop", and cost only "11-24 USD/kg" .
After revision: , or roughly an order of magnitude higher than the price of steelHistory In 2016 a paper by MacDonald et al told that the Armstrong powder was produced directly from the reduction of Titanium tetrachloride "in a continuous liquid loop", and cost only "11-24 USD/kg" .