The tetrachloride of this metal is important in its purification and in some versions of an alkene polymerization named for Ziegler and Natta.
This element's dioxide exhibits superhydrophilicity, and it has one of the highest refractive indexes. Compounds of this metal are used in the McMurry coupling, and along with aluminum it is found in Tebbe's reagent. Like magnesium, it can burn in pure nitrogen. It is found in the mineral rutile. The tetrachloride of this metal is important in its purification and in some versions of an alkene polymerization named for Ziegler and Natta. This transition metal is highly corrosion resistant and many of its properties are similar to Hafnium and Zirconium. For 10 points, name this metal whose alloys are often used in aircraft, symbolized Ti.
This element's dioxide exhibits superhydrophilicity, and it has one of the highest refractive indexes.
titanium [prompt on Ti]