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TiAlN-based and AlTiN-based coatings are both hard, wear-resistant coatings used for cutting tools and mechanical components. The composition of the two coatings is similar, but their order of deposition is different, resulting in slightly different properties. 

AlTiN coatings are more oxidation-resistant and can withstand higher temperatures, while TiAlN coatings have a higher hardness and lower coefficient of friction. 

Both coatings offer excellent wear resistance and extend the lifespan of cutting tools and mechanical components.

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