Both Gregor And Klaproth worked with titanium compounds. The main important isolation of almost pure titanium was attained in 1875 by Kirillov in Russia. Isolation in the pure metal wasn't shown until eventually 1910 when Matthew Hunter and his associates reacted titanium tetrachloride with sodium inside a heated steel bomb. https://glasslinedpipesuppliers82479.law-wiki.com/1554789/tin_sulfide_fundamentals_explained