This paper focuses on an innovative and low-cost additive layer manufacturing(ALM)process to fabricate TiAl based alloy wall components.Gas tungsten arc welding(GTAW)was implemented as the heat source for this new approach,combined with in-situ alloying through separate feeding of commercially pure titanium and aluminium wires into the weld pool.An appropriately designed argon gas shielding device was used to protect the process from oxidation.The results showed that the proposed weld-based additive manufacturing process is capable of successfully producing full density titanium aluminide components.