The difference between TiAlN Coating (Titanium Aluminum Nitride) & AlTiN Coating (Aluminum Titanium Nitride)

2025-09-10

TiAlN Coating (Titanium Aluminum Nitride)

Composition ratio: Titanium (Ti) content is higher than Aluminum (Al) (Al usually < 50%).
Key Features:
- Higher hardness, good wear resistance.
- Forms a dense Al₂O₃ oxide layer at high temperatures, improving heat resistance.
- Suitable for HSS and carbide tools.
Applications: Ideal for machining steel and stainless steel, especially in high-speed dry cutting.

AlTiN Coating (Aluminum Titanium Nitride)

Composition ratio: Aluminum (Al) content is higher than Titanium (Ti) (Al usually ≥ 60%).
Key Features:
- Higher Al ratio → forms a more stable, wear-resistant Al₂O₃ oxide layer at high temperatures.
- Better heat resistance than TiAlN.
- Hardness is slightly lower than TiAlN, but superior at elevated temperatures.
Applications: Suitable for hardened steel, high-strength alloys, and high-speed dry machining. Widely used in mold making and aerospace components.

Core Comparison

Aspect	TiAlN Coating	AlTiN Coating
Composition	Ti > Al	Al > Ti
Hardness	Higher	Slightly lower
Heat resistance	Good	Stronger
Oxide layer	Forms Al₂O₃	Forms a more stable Al₂O₃
Applications	Steel, stainless steel, general cutting	Hardened steel, high-temp alloys, mold machining, high-speed dry cutting

In simple terms:

Customized Carbide Tool