Aluminum alloy is generally more expensive than acrylic. This is primarily due to the manufacturing process, material properties, and applications of each material.

Aluminum alloy is a metal alloy composed of aluminum, copper, magnesium, silicon, and other elements. The production of aluminum alloy involves extracting aluminum from bauxite ore, refining it, and then alloying it with other metals. This process requires significant energy and resources, making aluminum alloy more expensive. Additionally, aluminum alloy has superior strength, durability, and corrosion resistance compared to acrylic. These properties make it suitable for high-performance applications such as aerospace, automotive, and construction industries.

On the other hand, acrylic is a thermoplastic polymer made from acrylic acid. It is produced through a chemical process that involves polymerizing acrylic acid monomers. Acrylic is relatively inexpensive to produce due to its simpler manufacturing process and lower material costs. It is widely used in various applications, including windows, signs, and consumer products. However, acrylic is less durable and has lower strength compared to aluminum alloy.

According to a report by Grand View Research, the global aluminum alloy market size was valued at USD 265.7 billion in 2020 and is expected to grow at a CAGR of 6.2% from 2021 to 2028. This growth is driven by increasing demand in the automotive and construction industries. In contrast, the global acrylic market size was valued at USD 6.1 billion in 2020 and is expected to grow at a CAGR of 5.5% from 2021 to 2028. The lower market value of acrylic is indicative of its lower cost compared to aluminum alloy.

In conclusion, aluminum alloy is more expensive than acrylic due to its superior material properties and higher production costs. The demand for aluminum alloy in high-performance applications further contributes to its higher price.