Improving mechanical properties without increasing costs is crucial to bring PM components in demanding application fields. One cost-effective strategy to enhance mechanical properties of sintered titanium alloys is the use of iron as a sintering aid. In this work specimens were manufactured by metal injection moulding (MIM) using pre-alloyed Ti-6Al-7Nb gas-atomised powder and 2 wt.% of fine iron powder. To evaluate the impact of enhanced sintering activity on mechanical properties of MIM Ti-6Al-7Nb by iron addition samples were sintered at 1250 °C and compared with iron free MIM Ti-6Al-7Nb samples sintered at 1350 °C. It was proved that the combination of lower sintering temperatures and iron leads to a strength increase of 100 MPa when compared with pure MIM Ti-6Al-7Nb and elongation values of around 16%. High cycle 4-point bending fatigue results indicate that when iron is used the colony refinement produced by lower sintering temperatures is more relevant than the reduced densification.