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Group 4 is a group of elements in the periodic table. It contains the elements titanium (Ti), zirconium (Zr), hafnium (Hf) and rutherfordium (Rf). This group lies in the d-block of the periodic table. The group itself has not acquired a trivial name; it belongs to the broader grouping of the transition metals.
Titanium is present in the Earthâs crust at a level of about 0.6% and is therefore the fourth most abundant structural metal after aluminum, iron and magnesium. Titanium is always bonded to other elements in nature.