1. If you have two materials on hand, one is aluminum and the other is titanium alloy, as long as the two materials are drawn on each other. The scratched one is aluminum. Because titanium is harder than aluminum.
2. Compared with acid resistance, aluminum reacts immediately with acid, and titanium has good acid resistance.
3. Measure the weight. Aluminum doors of the same size are the lightest, titanium doors are slightly heavier, and steel doors are the heaviest. But if the manufacturer deliberately deceives people, it is possible to make a door that is as heavy as titanium alloy by mixing aluminum and steel. It's easy to tell if there's steel in the door, though. Take a magnet to see if it will attract to the door. grade 7 titanium alloy plates are not magnetic and will not attract magnets.
4. Look at the color. Find an inconspicuous small corner and sand off a layer of oxide film or paint on the surface to fully expose the metal underneath. Then take a closer look at the color of the metal. Take an empty Coke can (aluminum), sand off the paint on the surface, and compare it to the door. Aluminum alloys are light gray, titanium alloys are dark gray, and they look glossier than aluminum.
5. If possible, you can also measure the resistance. The resistance of titanium alloy is much larger than that of aluminum alloy.
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