The intermetallic compounds FeTi and Fe 46Ti 50Mn 4 and their hydrides are investigated with Mossbauer spectroscopy. The isomer shift of the intermetallic compound FeTi was found to be negative at room temperature relative to the centre of the α-iron and isomer shift change from negative to positive with hydrogen absorption pressure. The quadrupole splitting is observed at 12 atm hydrogen pressure in FeTi system. The isomer shift was also found to be negative in the Fe 46Ti 50Mn 4 compound relative to the centre of iron and found to be decreasing in negative value with hydrogen absorption pressure towards the centroid. It is suggested that changes in the isomer shift is due to charge transfer from alloy to hydrogen with pressure because Fe is combined with the less electronegative partner element. According to the concept of electronegativity the large difference in electronegativity is needed to facilitate the charge transfer to hydrogen. The positron life-time measurements were also carried out to confirm the hydrogen interaction process with alloys. The positron life-time increases in hydrides in comparison to the parent intermetallic alloy because hydrogen takes electron from the conduction band of FeTi and Fe 46Ti 50Mn 4 during the absorption process. It was suggested that hydrogen interacts with the FeTi alloy obeying the anionic model.