1, aluminum alloy: aluminum and aluminum alloys can be melted in various ways. Coreless induction furnaces and trough induction furnaces, crucible furnaces and reflective open hearth furnaces (burning natural gas or fuel oil), resistance furnaces and electrothermal radiation furnaces are usually used.

2. Titanium alloy: Titanium alloy is an alloy composed of titanium and other elements. Titanium has two isomorphic crystals: below 882℃, it is closely arranged.

Second, the characteristics are different.

1, aluminum alloy: aluminum alloy has low density, but relatively high strength, close to or higher than high-quality steel. It has good plasticity, can be processed into various profiles, has excellent electrical conductivity, thermal conductivity and corrosion resistance, and is widely used in industry, and its consumption is second only to that of steel.

2. Titanium alloy: Titanium is a new metal, and its properties are related to the contents of impurities such as carbon, nitrogen, hydrogen and oxygen. The purest titanium iodide has an impurity content of less than 0. 1%, but it has low strength and high plasticity.

Third, the application is different.

1, aluminum alloy: It has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding, chemical industry and other industries. With the rapid development of industrial economy, the demand for aluminum alloy welded structural parts is increasing, which makes the research on aluminum alloy weldability deepen.

2. Titanium alloy: Titanium alloy is mainly used to manufacture compressor parts of aircraft engines, followed by structural parts of rockets, missiles and high-speed aircraft.

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