The disadvantages of aluminum alloy profiles: poor heat resistance.

The long-term operating temperature is usually no more than 150℃, and above 200℃, the strength will drop sharply (for example, the strength of 6061-T6 decreases by 50% at 300℃).
- **Restricted scenarios**: For engine components exposed to high temperatures, titanium alloys or heat-resistant steels should be used instead.