Therefore the key for welding from copper side is to have optimum melt with beneficial phases like Cu and Al+ Al2Cu and the detrimental phases intermixed between the ductile phases From the tensile shear test for a strong joint, fracture is obtained on the heat-affected zone (HAZ) of Al. Energy dispersive X-ray spectroscopy (EDS) analysis indicate that large amount of beneficial Cu solid solution and Al rich phases is formed in the strong joint. Therefore optimum mixing must be maintained. However excessive mixing leads to formation of more detrimental phases and less ductile phases. Therefore the mixed composition strengthens the joint. By fusion of Cu and Al the two sheet metals are welded, with presence of beneficial Cu solid solution phase and Al+Al2Cu in the joint with the brittle phases intermixed between the ductile phase. Because of this advantage, 515 nm is selected for the current research. In addition to low laser power, a stable welding is obtained with 515 nm. A significantly lower laser power can be used with 515 nm laser in comparison to 1030 nm. The main objective of irradiating the laser beam from the copper side (Cu on top) is to exploit higher solubility of Al in Cu. This research focus on welding from Cu side to Al sheet. In laser joining of copper (Cu) and aluminum (Al) sheets, the Al sheet is widely chosen as the top surface for laser irradiation because of increased absorption of laser beam and lower melting temperature of Al in contrast to Cu. For 3D-printed dental implants, the higher the surface roughness, the lower the mechanical properties, ultimately leading to decreased implant life and poor performance. When the cycle decreases from 262142 to 137433, Ra shows that less than a 90.74% increase in cycle is obtained. The results show that when the ultimate tensile stress (UTS) decreases from 968.35 MPa to 955.25 MPa, Ra increases by 1.4% and when UTS increases to 961.18 MPa, Ra increases by 0.6%. Samples with a complex geometry exhibited a higher roughness surface, which was the greatest difficulty of additive manufacturing when evaluating surface finish. The 3D-printed dental implant recorded Ra with a 3.4 mm diameter at 43.23% and the 3D-printed dental implant with a 4.3 mm diameter at 26.18%. During the experiment, roughness values were analysed and the results showed that the skewness parameter demonstrated a minimum value of 0.596%. The purpose of this paper is to experimentally investigate the effect of surface roughness of 3D-printed dental implants and 3D-printed dogbone tensile samples under areal height (Ra) parameters, amplitude parameters (average of ordinates), skewness (Rsk) parameters and mechanical properties. Each parameter contributes significantly towards the survival and mechanical properties of 3D-printed specimens. The characterisation of surface topography is a complicated branch of metrology, with a huge range of parameters available. The initial stability after implantology is paramount to the survival of the dental implant and the surface roughness of the implant plays a vital role in this regard.