An investigation was made of the diffusion by reacting 3N-purity Ti with H and measuring the absorption. It was found that the diffusivity of H in hexagonal close-packed α-Ti, at between 610 and 900C, could be described by:

D (cm2/s) = 0.03 exp[-14.7(kcal/mol)/RT]

The diffusivity of H in the body-centered cubic β phase at 900C was equal to 1.8 x 10-4 cm2/s

T.P.Papazoglou, M.T.Hepworth: Transactions of the Metallurgical Society of AIME, 1968, 242[4], 682-5