Lightweight, strong materials like titanium and aluminum are popular in lots of industries, titanium parts is ideal to be used for reducing weight and decrease energy consumption. To find the best solutions for your project, it’s important to understand the properties and characteristics of each metal, titanium vs aluminum, what’s the difference between them ans which one to choose? Take a look at the comparison between aluminum and titanium alloy and their advantages, applications.
What is Aluminum?
Aluminum is a silvery-white, soft, strong, non-magnetic and ductile metal with good weight-to-strength ratio, good corrosion resistance and high fracture toughness. Aluminum is an economical option due to its ease of machining and cheap price.
The mechanical properties and characteristics determines aluminum is suitable for many applications. For example, aluminum can be used in conductor as its good electric conductivity, you can often found aluminum CNC machining parts in cooking devices and utensils because of its good thermal conductivity and non toxic features. Aluminum does not react to acids, but easy to corrode in alkaline environments.
What is Titanium?
Titanium is a lustrous transition metal with a silver color, low density, high strength, good thermal conductivity and good corrosion resistance, but it’s difficult to extract and machine, make it more expensive than many other metals. Titanium is also non-magnetic and non-toxic, but it’s a poor conductor of electricity. Rather than absorb heat, titanium likes to reflect it, in addition, it has a low thermal expansion.
The high biocompatibility is also a remarkable feature of titanium. The strength and safety make titanium is a great material for medical equipment, like dental implants, knee replacements, pace makers, and more, titanium machined parts also can be used in chemical and marine applications as it resistant to corrosion.
Titanium and aluminum are both lightweight and strong metals that are commonly applied in CNC services and manufacturing. What is the difference between titanium and aluminum and which one to choose? Check out the following tables comparing aluminum and titanium alloys in some properties, which show how they differ and the better one for given environment.
Chart 1 – Comparison between aluminum and titanium
Chart 2 – Comparison between titanium grade 5, aluminum 6061 and 7075 alloys
Figure out where is titanium different from aluminum, we can easier to find which alloy to use for your machining parts.
Definitely, aluminum is a more cost-effective metal for CNC machining, while titanium parts simply last longer. High cost of extraction and fabrication limits some applications of titanium.
2. Weight and strength
Titanium is heavier than aluminum, but its inherent strength means that you need less of it.
– Titanium is often used in aerospace, aircraft and spacecraft, satellite components, fixtures, and brackets, medical applications like dental implants, surgical instrumentation, marine industry including hip hulls, submarines, and other structures exposed to seawater, and applications require heat resistance.
– Aluminum products applications including bicycle frames, fishing reels, small boats, and vehicle frames, molds for plastics and tooling, aircraft frames, electrical conductor, heat sinks, and applications require high thermal conductivity.
Aluminum is easy to process in CNC turning, milling, drilling and more, while titanium is hard to work with.
Titanium’s higher density means that strength-to-weight ratios for the two metals tend to be similar.
Aluminium comes in a silvery white color and varies from silver to dull grey depending on the surface roughness, while titanium has a silver surface.