In the field of precision manufacturing, material selection directly impacts product performance and production costs. This article will conduct an in - depth comparison of the cost differences between Aluminum (including Aluminum turned parts and cnc milling machine aluminum) and titanium alloy in CNC machining for OEMs from aspects such as material properties, processing difficulties, and industry applications, and analyze how to optimize the selection based on requirements.
Aluminum 7075 vs. Titanium CNC machining cost comparison
2025-11-26
Material Essence Differences: Physical Property Comparison between Aluminium turned parts and Titanium Alloy
Aluminium 7075 (aerospace - grade aluminum alloy) and titanium alloy (such as Ti - 6Al - 4V) perform quite differently in OEM parts machining:Strength and Weight7075 Aluminum Alloy: Tensile strength is 570MPa, density is 2.8g/cm³, with an excellent strength - to - weight ratio.
Titanium Alloy: Tensile strength ranges from 900 - 1100MPa, density is 4.5g/cm³, with a strength close to that of steel but 40% lighter.
Thermal Performance
Aluminum Alloy: Thermal conductivity is 130W/m·K, with fast heat dissipation, suitable for high - speed machining.
Titanium Alloy: Thermal conductivity is 7W/m·K, and heat tends to accumulate during processing, requiring a dedicated cooling solution.
Corrosion Resistance
7075 requires anodizing treatment to enhance corrosion resistance.
Titanium Alloy is inherently corrosion - resistant, especially suitable for implants in medical CNC machining.
Analysis of Processing Challenges: Cost - Driving Factors in CNC machining for OEMs
The cost differences between the two materials in CNC machining for OEMs mainly come from the following aspects:Tool Wear Machining titanium alloy requires diamond - coated tools, which cost three times that of aluminum alloy tools and have a lifespan of only 200 minutes.
7075 Aluminum Alloy can use high - speed steel tools, and the lifespan of a single tool can reach 1000 minutes.
Cutting Parameter Limitations
Aluminum Alloy: The spindle speed can reach 8000rpm, and the feed rate is 0.3mm/tooth.Titanium Alloy: The speed is limited to below 1500rpm, and the feed rate needs to be reduced to 0.1mm/tooth.
Aluminium 7075 (aerospace - grade aluminum alloy) and titanium alloy (such as Ti - 6Al - 4V) perform quite differently in OEM parts machining:Strength and Weight7075 Aluminum Alloy: Tensile strength is 570MPa, density is 2.8g/cm³, with an excellent strength - to - weight ratio.
Titanium Alloy: Tensile strength ranges from 900 - 1100MPa, density is 4.5g/cm³, with a strength close to that of steel but 40% lighter.
Thermal Performance
Aluminum Alloy: Thermal conductivity is 130W/m·K, with fast heat dissipation, suitable for high - speed machining.
Titanium Alloy: Thermal conductivity is 7W/m·K, and heat tends to accumulate during processing, requiring a dedicated cooling solution.
Corrosion Resistance
7075 requires anodizing treatment to enhance corrosion resistance.
Titanium Alloy is inherently corrosion - resistant, especially suitable for implants in medical CNC machining.
Analysis of Processing Challenges: Cost - Driving Factors in CNC machining for OEMs
The cost differences between the two materials in CNC machining for OEMs mainly come from the following aspects:Tool Wear Machining titanium alloy requires diamond - coated tools, which cost three times that of aluminum alloy tools and have a lifespan of only 200 minutes.
7075 Aluminum Alloy can use high - speed steel tools, and the lifespan of a single tool can reach 1000 minutes.
Cutting Parameter Limitations
Aluminum Alloy: The spindle speed can reach 8000rpm, and the feed rate is 0.3mm/tooth.Titanium Alloy: The speed is limited to below 1500rpm, and the feed rate needs to be reduced to 0.1mm/tooth.
- The material purchase prices of Aluminum 7075 and titanium alloy also vary significantly:
- 7075 Aluminum Alloy: The market price is approximately $5 - 8/kg.
- Titanium Alloy (Ti - 6Al - 4V): The market price is approximately $50 - 100/kg.
- This means that for the same volume, the material cost of titanium alloy is usually more than 10 times that of aluminum alloy. For large - scale parts or mass - production projects, this price difference in raw materials will significantly affect the total cost.Total Cost Composition AnalysisThe cost of a complete CNC machining for OEMs project usually includes:
- 1 Material Cost (Accounting for 30 - 60%)
Raw material purchase cost
Material utilization rate (proportion of processing waste)
2 Processing Cost (Accounting for 40 - 70%)
2 Processing Cost (Accounting for 40 - 70%)
Tool wear (as described above)
Equipment working hour cost
Surface treatment cost
3 Additional Costs
3 Additional Costs
Quality inspection
Logistics and transportation
Typical Case Comparison (Batch of 100 Pieces)
Typical Case Comparison (Batch of 100 Pieces)
Additional Costs for Surface Treatment
Aluminium turned parts or cnc milling machine aluminum often require anodizing ($0.5 - 2/piece).
Titanium Alloy Parts require sandblasting + chemical polishing ($1 - 3/piece).
Taking a shaft - shaped part with a diameter of 30mm as an example:
Processing Cost of 7075 Aluminum Alloy Parts: $12/piece (including anodizing).
Processing Cost of Titanium Alloy Parts: $38/piece (including surface treatment).
Industry Application Differentiation: From CNC auto parts to component test fixtures for semiconductor industry
The material selection logic of different industries is distinct:
Automotive Manufacturing
Aluminium turned parts are preferentially selecte.
Aluminium turned parts or cnc milling machine aluminum often require anodizing ($0.5 - 2/piece).
Titanium Alloy Parts require sandblasting + chemical polishing ($1 - 3/piece).
Taking a shaft - shaped part with a diameter of 30mm as an example:
Processing Cost of 7075 Aluminum Alloy Parts: $12/piece (including anodizing).
Processing Cost of Titanium Alloy Parts: $38/piece (including surface treatment).
Industry Application Differentiation: From CNC auto parts to component test fixtures for semiconductor industry
The material selection logic of different industries is distinct:
Automotive Manufacturing
Aluminium turned parts are preferentially selecte.
Case: In a certain electric vehicle battery bracket project, the 7075 aluminum alloy solution saves 60% of the cost compared to titanium alloy.
Typical Applications: CNC auto parts (suspension components, drive shafts).
Medical Equipment
Titanium alloy dominates, despite the high cost of medical CNC machining.
Typical Applications: CNC auto parts (suspension components, drive shafts).
Medical Equipment
Titanium alloy dominates, despite the high cost of medical CNC machining.
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