A neutral particle analyzer operating in the MeV energy range was used to measure a flux of tritium atoms emanating from the hot-ion H-mode deuterium plasma heated by the deuterium neutral beams, producing DD fusion tritons. We found that tritons of ~0.3-1.1MeV were largely neutralized by the beam atoms and the beam halo atoms. This enabled us to find the localized energy distribution function of the DD fusion tritons in the plasma bulk. Simulation of the triton energy distribution function showed that MeV ions in JET hot-ion H-mode plasma equilibrate classically.