Modgil, A., Schueller, J., Ziegert, J., and Bhattacharyya, A., "Effects of High Productivity Machining on Ti-6Al-4V Surface Topography," SAE Technical Paper 2004-01-2827, 2004, doi:10.4271/2004-01-2827.
Surface defects were demonstrated to result from high productivity machining (HPM) as well as conventional machining of a titanium alloy Ti-6Al-4V, with HPM causing the larger sized defects. These defects could act as initiation sites for fatigue cracks showing that machining would affect fatigue strength and life of the part produced. A finishing pass appears to remove the defects. Better understanding is needed of the relationships between machining, surfaces, and strength.