Titanium and its alloys are considered high performance materials because of the combination of properties such as mechanical strength, low density and strength up to high temperatures. The same properties also result in poor machinability and high temperatures that may produce tensile residual stresses and surface damage. These characteristics, in special residual stresses, impact directly on fatigue life, the main failure mode in aeronautical industry and corresponding to 60% of failures. Thus large amounts of coolant are required in machining operations to avoid surface damage, which may represent up to 30% of the total machining costs. Among the alternatives for reducing the coolant consumption, minimum quantity lubrication (MQL) has been evaluated for drilling and turning both in terms of tool wear and surface integrity. However there is a gap in regard of milling operations and the impacts on surface integrity parameters, and this is the focus of the present study. On a first phase, the machining forces were investigated, as well as chip morphology and characteristics related to its formation mechanism. Then the workpiece quality was evaluated in terms of surface residual stresses, roughness and hardness beneath the machined surface, comparing the MQL method to conventional cooling with flood of coolant. Machining forces were found to be lower for MQL conditions (10% lower as compared to flood cut), and this is believed to be a result of thermal softening of the material. Segmented chips were observed for all the cutting conditions. The aspect of the free surface of the chip, discontinuous segments, and cracks are evidence that a crack propagation mechanism is involved in chip formation. In terms of surface integrity parameters, results indicate that MQL does not affect the surface roughness, but residual stresses are less compressive than when using flood of coolant. Considering the range of parameters that were tested, radial depth of cut had no influence on residual stresses. Conditions which developed higher machining forces and consequently mechanical load resulted in less compressive residual stresses caused by the increased thermal load due to plastic strain. The hardness beneath the surface was affected by the lubri-cooling method in the finishing operations. Flood cut induced higher levels of cold work, while in MQL machining the thermal softening compensates the increase in surface hardness, and the final state is rather similar to the bulk value. In the case of semi-finishing conditions, machining with MQL increased the surface hardness. Flood cut, on the other side, produced a subsurface hardness peak (from 300 to 600 ?m beneath surface, approximately).