Group 4 Metallic Elements:

Titanium is the first member of the 3d transition series and has four valence electrons, 3d24s2.  The most stable and most common oxidation state is +4; however, compounds in a range of lower oxidation states, -I, 0, II, III, are also known, although thery are readily oxidized to TiIV by air, water, or other reagents.  The other group 4 metals include Zirconium, Hafnium and Unnilquadium.  The metals are poor conductors of heat and electricitycompared with most othe metals.