An electrolytic technique for growing rutile is described. The crystals obtained show n‐type electrical conductivity. The defect structure was studied by EPR. The behavior of the conductivity and the changes in the defect structure as a result of heat‐treatment in an oxidizing atmosphere shows the as‐grown crystals to be oxygen deficient. An EPR spectrum of Pt3+ in rutile is reported for the first time and a spectrum previously attributed to substitutional Ti3+ is confirmed as such.