**3. Conclusions and Outlook**

Machining continues to be a field of strong investment by researchers, looking for new solutions that increase the competitiveness and sustainability of this type of subtractive process. Despite the strong increase in number that additive processes have undergone in the last two decades, the quality of the finish exhibited by machining processes is difficult to match using additive processes. Hence, hybrid processes and equipment are emerging, with a view to responding more effectively to market needs. More recently developed alloys also lead to new research needs, as well as new materials, such as fiber metal laminates.

(The emergence of recently developed alloys and new materials, such as fiber metal laminates (FMLs), creates new research requirements and opportunities.)

Environmental sustainability, in addition to economic sustainability, has also been a factor to be considered in the area of machining. The development of more durable tools, as well as the establishment of cutting conditions that promote a longer tool life, has received increasing attention from researchers. The development of tools capable of assisting professionals in budgeting operations is also another concern of researchers, who have been developing models that aim to increase the accuracy of estimates. It can thus be seen that the machining area remains particularly active in terms of research and development, which is extremely beneficial for all those who are particularly attracted to these technologies. All of this can be found in this Special Issue.

**Conflicts of Interest:** The authors declare no conflict of interest.
