The Ce-containing analogue of brannerite (ie, UTi 2 O 6 ) was previously considered to be stoichiometric (ie, CeTi 2 O 6 ); however, it has recently been determined that the material is O deficient.This oxygen-deficient material has been suggested to be charged balanced by the presence of a minor concentration of Ce 3+ or by the A-site being cation deficient with the Ce oxidation state being 4+. A variety of Ti-containing oxides (including brannerite) have been investigated as potential nuclear wasteforms, and it is necessary to understand the electronic structure of a proposed nuclear wasteform material as well as how the structure responds to radiation from incorporated waste elements. The radiation resistance of a material can be simulated by ion implantation. The objective of this study was to confirm the Ce oxidation state in the cationand oxygen-deficient material (ie, Ce 0.94 Ti 2 O 6 − δ ) and to determine how radiation damage affects this material. X-ray photoelectron spectroscopy (XPS) and X-ray absorption near-edge spectroscopy were used to study Ce 0.94 Ti 2 O 6 − δ before and after being implanted with 2 MeV Au − ions.Analysis of the Ce 3d XPS spectra from the as-synthesized samples by using a previously developed fitting method has unequivocally shown that Ce adopts both 4+ (major) and 3+ (minor) oxidation states, which was confirmed by examination of magnetic susceptibility data. Analysis of XPS and X-ray absorption near-edge spectroscopy spectra from ion-implanted materials showed that both Ce and Ti were reduced because of radiation damage and that the local coordination environments of the cations are greatly affected by radiation damage.