Objective:To investigate the mechanical properties of pure titanium by adding trace Ti-6Al-4V powder in SLM printing manufacturing at two different heat treatment temperatures(650 ℃,2 h and 700 ℃,2 h)and different scanning speeds(1000 mm/s and 500 mm/s).Methods:SLM samples with two different scanning speed(GA:1000 mm/s,GB:500 mm/s)were prepared and heat treated with 650 ℃,2 h(HT1)and 700 ℃,2 h(HT2).The mechanical properties of the materials were tested,and the fracture morphology and microstructure were observed with LSCM and SEM.Results:The tensile strength of SLM printed pure titanium samples was higher at 1000 mm/s(＞20％),and the elongation was higher at 500 mm/s.Consistent annealing revealed that the 650 ℃,2 h treatment yielded outstanding mechanical performance at both scanning speeds.Conclusion:SLM-ed pure titani-um material by adding trace Ti-6Al-4V powder can better meet the requirements of oral restorations compared to SLM-ed Ti-6Al-4V alloy.
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