Titanium Grade 5

Your guide to Titanium Grade 5 Machining

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The most commonly used grade of titanium

Exceptionally high strength

Excellent corrosion resistance

Titanium is one of the strongest materials available as well as having high corrosion and heat resistance. It’s also exceptionally light weight, making it a perfect choice for applications where a high strength to low weight ratio is required.

This guide will take you through the main attributes, common applications, notes for designers and suitable finishing and treatments, as well as UK stock sizes and property tables. Don't forget to bookmark the page so you can refer back later.

If you are interested in titanium grade 2 machined parts, please scroll to the bottom of the page for more information about our service and to request a quote.

Grade 5 Guide: Properties, Applications and Design Considerations

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What is Grade 5 Titanium?

Grade 5 titanium is an alpha-beta alloy, made up of 6% aluminium and 4% vanadium. It accounts for around 50% of global titanium alloy usage and is readily available. Nicknamed the ‘workhorse alloy’, grade 5 is appropriate for highly demanding applications; benefiting from exceptional strength and high heat and corrosion resistance. As well as being widely used in aerospace applications, it’s also popular in the medical industry and in particular surgical implants.

Titanium Grade 5 Machinability

Titanium is similar to machine as austenitic stainless steels. It is recommended to use low cutting speeds to minimise heat build-up. Faster speeds will significantly reduce tool life. Our engineering team here at Penta are very experienced in machining titanium and know which cutters and settings to use to get the best out of the material.

Similar or obsolete designation, material specifications and trade names

Ti-6Al-4V ELI (Grade 23) is a higher purity version of Ti-6Al-4V and its properties are particularly well suited to dental and medical applications.

Material specifications: UNS R56400, AMS 4928, AMS 4911, BS TA11 (bar), ASTM B348 (bar), MIL-STD-2154, BS 3 TA10 (sheet, strip), BS 2 TA56 (plate), BS 2 TA59 (sheet, strip), ASTM B265 (Sheet/plate)

Main Attributes:

Exceptionally high strength
High heat resistance
Good mechanical strength
Low density
Excellent corrosion resistance
Biocompatible

Good creep resistance
Easy to clean
Superior strength to weight ratio
Fully heat treatable (sections up to 25mm)
Good weldability

Notes for Designers:

Titanium is considered to be a difficult material to machine and tool wear is high compared to other materials. Therefore it’s recommended that titanium is only used where its properties are needed for the application – largely its strength per unit mass. If pure strength is the primary requirement, stainless steel might be a better fit.

It is worth noting that small pockets will be expensive to machine because it would require specialist cutting tools. When titanium is being machined, the tool absorbs heat so it needs good clearance to allow for cooling. A general rule is that a tool used for machining titanium should be no more than 70% of the diameter of the pocket. This extra expense needs to be factored in to a project with small pockets.

Finishing & Treatments:

Titanium is suitable for several different treatments. Anodising and specifically sulphuric anodising can improve strength by increasing the thickness of the oxide layer. Anodising can also be used to change the colour of the metal.

See our Finishing Processes page for further information on services that we can facilitate.

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UK Stock Sizes

Grade 5 UK Stock Sizes

Titanium Grade 5 is readily available in the UK, particularly in plate and sheet. It is also widely available in bar and rod.

Please note we do not supply stock material, the information provided is purely for design and research purposes.

Technical Properties

Grade 5 Technical Properties

Titanium Grade 5 ASTM Physical Properties

Physical Properties	Value
Density	4.43 g/cm³
Melting Point	1760 °C
Modulus of Elasticity	113.7 GPa
Thermal Conductivity (Room Temp)	7.41 W/m°C
Electrical Resistivity (at 20°C)	1.71 omegamm2/m