TiAl alloys exhibit good potential for application in high-temperature aero-engine components. To enhance initial flame growth rates and subsequent combustion efficiency, oxygen-enriched intake technology is commonly adopted in aircraft. Research indicates that when O2 exceeds 30vol%,combustion efficiency increases dramatically. However, system stability decreases, potentially leading to severe internal oxidation and oxide scale spallation in service alloys. Therefore, building upon previous investigations into solvothermal fluorination, the present study introduces a combined modification strategy that involves magnetron sputtering of an aluminum coating followed by pre-oxidation, aiming to overcome the protection limitations of single fluorination in TiAl alloys. The effects of aluminum coating and pre-oxidation on the oxidation behavior were systematically investigated at 900 ℃ in a N2-40vol%O2 atmosphere. The phase composition, morphology and interfacial structure of the oxide scales were characterized using XRD,SEM/EDS and TEM. The results demonstrate that pure O2 pre-oxidation enables the formation of a highly pure and dense initial Al2O3 layer, effectively suppressing outward diffusion of Ti. The aluminum coating serves as an “Al reservoir”, continuously supplying Al during prolonged oxidation and significantly delaying the initiation and propagation of the Al-depleted layer in the substrate. Among the four conditions, the aluminized sample with pure O2 pre-oxidation exhibits optimal performance: no spallation occurs after 200 h of oxidation, the Ti content in the oxide scale remains below 2.4at%, and the Al-depleted Ti3Al transition layer ultimately reaches a thickness of only approximately 5 nm. This combined modification strategy provides a novel approach for the high-temperature structural protection of TiAl alloys under oxygen-enriched combustion conditions.