ANSI
ANSI Z136.1 - Safe Use of Lasers
Ikmanda RoswatiPh.D.Indonesia
Ultrafast photonics and laser-matter interaction, Pulse-duration effects in applied physics, Optical diagnostics and metrology for process stabilityPublished
Jan 6, 2026
Titanium Laser Cleaning
Titanium laser cleaning requires fluence between 1.5-2.1 J/cm² to prevent alpha case formation and surface oxidation. This lightweight metal has density of 4510 kg/m³ and tensile strength of 345 MPa. Low thermal conductivity (21.9 W/m·K) means heat concentrates locally, requiring shorter pulses and higher scan speeds than steel.
Cleaning parameter validation for this surface typically aligns with In Situ Power Plants guidance.
Cleaning parameter validation for this surface typically aligns with In Situ Power Plants guidance.
Laser-Material Interaction
Titanium has a narrow process window. The ablation threshold is 1.5 J/cm². The damage threshold is 2.1 J/cm². This 0.6 J/cm² window requires precise control.
Absorptivity is 36% at 1064 nm. Reflectivity is 46%. Thermal diffusivity is 9.29×10⁻⁶ m²/s. Heat spreads slowly. Alpha case forms above 425°C (698 K). Blue/purple discoloration indicates oxidation. Effective cleaning uses 1.0-1.8 J/cm². Never exceed 2.0 J/cm². Inert gas atmosphere (argon) prevents oxidation. For Ti-6Al-4V, use 1.0-1.5 J/cm². For commercially pure titanium, use 0.8-1.5 J/cm².
Absorptivity is 36% at 1064 nm. Reflectivity is 46%. Thermal diffusivity is 9.29×10⁻⁶ m²/s. Heat spreads slowly. Alpha case forms above 425°C (698 K). Blue/purple discoloration indicates oxidation. Effective cleaning uses 1.0-1.8 J/cm². Never exceed 2.0 J/cm². Inert gas atmosphere (argon) prevents oxidation. For Ti-6Al-4V, use 1.0-1.5 J/cm². For commercially pure titanium, use 0.8-1.5 J/cm².
Thermal Destruction
1,941
K
0
1,941
3,882
Laser Absorption
0.42
0
0.42
0.84
Laser Damage Threshold
5
J/cm²
2
5
10
Ablation Threshold
1.5
J/cm²
0
1.5
3
Thermal Diffusivity
9.3e-6
m²/s
0
9.3e-6
1.9e-5
Thermal Expansion
8.6e-6
K^{-1}
0
8.6e-6
1.7e-5
Specific Heat
522
J/kg·K
0
522
1,044
Thermal Conductivity
21.9
W/m·K
0
21.9
43.8
Laser Reflectivity
0.66
0
0.66
1.32
Absorption Coefficient
4e7
m⁻¹
2e7
4e7
6e7
Absorptivity
0.4
0.3
0.4
0.5
Reflectivity
0.6
0.5
0.6
0.7
Thermal Destruction Point
1,941
K
1,900
1,941
2,000
Thermal Shock Resistance
2.5
MW/m
1.5
2.5
3.5
Vapor Pressure
10
Pa
0.1
10
100
Material Characteristics
Titanium has density of 4510 kg/m³ and tensile strength of 345 MPa. Thermal conductivity is low at 21.9 W/m·K. The laser damage threshold is 2.1 J/cm². The ablation threshold is 1.5 J/cm².
Reflectivity is 46% at 1064 nm. Absorptivity is 36%. Melting point is 1941 K. Titanium has high affinity for oxygen. Alpha case (oxygen-rich layer) forms above 698 K (425°C). Blue/purple discoloration indicates oxidation. Low thermal conductivity concentrates heat locally. Commercially pure titanium (Grade 2) and Ti-6Al-4V (Grade 5) have different cleaning parameters.
Reflectivity is 46% at 1064 nm. Absorptivity is 36%. Melting point is 1941 K. Titanium has high affinity for oxygen. Alpha case (oxygen-rich layer) forms above 698 K (425°C). Blue/purple discoloration indicates oxidation. Low thermal conductivity concentrates heat locally. Commercially pure titanium (Grade 2) and Ti-6Al-4V (Grade 5) have different cleaning parameters.
Density
4,510
kg/m³
0
4,510
9,020
Surface Roughness
1.6
μm
0
1.6
3.2
Tensile Strength
345
MPa
0
345
690
Youngs Modulus
110
GPa
0
110
220
Hardness
160
HV
0
160
320
Flexural Strength
345
MPa
0
345
690
Oxidation Resistance
698
K
0
698
1,396
Corrosion Resistance
0.001
mm/year
0
0.001
0.002
Compressive Strength
414
MPa
0
414
828
Fracture Toughness
55
MPa√m
0
55
110
Electrical Resistivity
4.2e-7
Ω·m
0
4.2e-7
8.4e-7
Absorption Coefficient
4.4e7
m^{-1}
0
4.4e7
8.7e7
Absorptivity
0.36
0
0.36
0.72
Boiling Point
3,560
K
0
3,560
7,120
Electrical Conductivity
2.4e6
S/m
0
2.4e6
4.8e6
Laser Damage Threshold
2.1
J/cm²
0
2.1
4.2
Melting Point
1,941
K
0
1,941
3,882
Reflectivity
0.0046
0
0.0046
0.0092
Thermal Destruction Point
1,941
K
0
1,941
3,882
Thermal Shock Resistance
252
K
0
252
504
Vapor Pressure
1.2e-62
Pa
0
1.2e-62
2.5e-62
Machine Settings
Start with fluence at 1.0-1.8 J/cm², between the 1.5 J/cm² ablation threshold and 2.1 J/cm² damage threshold. Use 1064 nm wavelength with 20 ns pulse width. Scan at 1500 mm/s with 60% overlap. Frequency at 50 kHz. Spot size at 300 μm.
Titanium has low thermal conductivity (21.9 W/m·K) and high oxygen affinity. Never exceed 2.0 J/cm². Use inert gas assist (argon) for critical applications. For Ti-6Al-4V, use 1.0-1.5 J/cm². For CP titanium, use 0.8-1.5 J/cm². For thin sections (<3 mm), reduce fluence by 20-30%. Monitor for blue/purple discoloration. If color appears, reduce fluence by 0.2-0.3 J/cm².
Titanium has low thermal conductivity (21.9 W/m·K) and high oxygen affinity. Never exceed 2.0 J/cm². Use inert gas assist (argon) for critical applications. For Ti-6Al-4V, use 1.0-1.5 J/cm². For CP titanium, use 0.8-1.5 J/cm². For thin sections (<3 mm), reduce fluence by 20-30%. Monitor for blue/purple discoloration. If color appears, reduce fluence by 0.2-0.3 J/cm².
Wavelength
1,064
nm
355
1,064
1.1e4
Spot Size
300
μm
0.1
300
500
Energy Density
1
J/cm²
0.1
1
20
Pulse Width
20
ns
0.1
20
1,000
Scan Speed
1,500
mm/s
10
1,500
5,000
Pass Count
2
passes
1
2
10
Overlap Ratio
60
%
10
60
90
Laser Power
100
W
1
100
120
Laser Power Alternative
100
W
20
100
500
Frequency
50
kHz
1
50
200
Fluence Threshold
2.5
J/cm²
0.3
2.5
4.5
Regulatory Standards
Laser cleaning titanium produces fine titanium particulates. Use local exhaust ventilation with HEPA filtration. Titanium dust is combustible; prevent accumulation.
Titanium reflects 46% of 1064 nm energy. Use full beam enclosure and laser safety eyewear for 1064 nm (OD 5+). Follow ANSI Z136.1. The primary hazard is alpha case formation above 2.0 J/cm². For medical implants (ASTM F136), validate surface finish post-cleaning. Inert gas assist (argon) reduces oxidation risk.
Titanium reflects 46% of 1064 nm energy. Use full beam enclosure and laser safety eyewear for 1064 nm (OD 5+). Follow ANSI Z136.1. The primary hazard is alpha case formation above 2.0 J/cm². For medical implants (ASTM F136), validate surface finish post-cleaning. Inert gas assist (argon) reduces oxidation risk.
Industry Applications
Titanium is critical in high-performance high-temperature alloys, nuclear, and energy applications where temperature and corrosion resistance are paramount. Laser cleaning removes thermal oxide scale and machining residue from titanium without the micro-scratching that abrasive methods introduce.
FAQ
Titanium laser cleaning questions focus on narrow process window, alpha case prevention, and alloy grade differences. Answers below reference the 1.5-2.1 J/cm² operating window.
titanium laser cleaning thermal property challenges
Low thermal conductivity (21.9 W/m·K) traps heat locally. Use shorter pulses and higher scan speeds. Alpha case forms above 425°C. Never exceed 2.0 J/cm². Inert gas assist (argon) prevents oxidation. Monitor for blue/purple color. Discoloration indicates alpha case.
titanium alloy grade laser cleaning settings difference
Ti-6Al-4V (Grade 5): use 1.0-1.5 J/cm². CP titanium (Grade 2): use 0.8-1.5 J/cm². Grade 5 has lower thermal conductivity. Grade 2 oxidizes more easily. Test parameters on sample first. Never exceed 2.0 J/cm² for any grade.
titanium laser cleaning parameter recommendations
Use fluence at 1.0-1.8 J/cm². Never exceed 2.0 J/cm². 1064 nm, 20 ns pulse width, 1500 mm/s scan speed, 60% overlap. For Ti-6Al-4V: 1.0-1.5 J/cm². For CP Ti: 0.8-1.5 J/cm². Inert gas for critical applications. No discoloration allowed.
titanium laser cleaning cost
Aerospace component cleaning: $20-100 per part. Medical implant cleaning: $10-50 per implant. CP titanium sheet: $5-15 per square foot. Narrow process window (1.5-2.1 J/cm²) requires precise control. Inert gas assist adds 20-30% to cost. Alpha case rejection adds rework cost.
Titanium Dataset
Download Titanium properties, specifications, and parameters in machine-readable formats
51
Variables
0
Laser Parameters
0
Material Methods
11
Properties
3
Standards
3
Formats
License: Creative Commons BY 4.0 • Free to use with attribution •Review CC BY 4.0 license terms