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These alloys due to its intermetallic structure exhibit some special properties such as low density, high strength, high stiffness, corrosion resistance, and creep resistance. When these components are manufactured, surface integrity is one of the most relevant parameters used to evaluate the quality of the parts. Severe surface integrity problems are reported in the literature, defects such as microstructural alterations, work hardening, residual stresses, surface cracks, among others induced by the cutting process. The surface and sub-surface alteration induced by machining are critical because it will affect the parts performance. Some parameters affect the quality of machined surface. In particular cutting parameters, cutting tools material, tool wear and material properties are the most frequently investigated. Experimental and empirical studies are presented mainly in order to understand the surface integrity induced by machining. This paper provides an overview of the problems associated with the machining process of various types of titanium aluminides. The cutting tools, machining parameters, as well as processing parameters employed to improve machinability and reduce surface defects in titanium aluminides are analyzed and discussed. Particular focus was given to turning and milling process of gamma titanium aluminides. Also, some of the optimal parameters for machining titanium aluminides are presented offering a compilation of the most relevant information from the first to the most recent works that analyze the different aspects that affect the machining of these alloys.<\/jats:p>","DOI":"10.1177\/1464420718809386","type":"journal-article","created":{"date-parts":[[2018,11,7]],"date-time":"2018-11-07T05:45:05Z","timestamp":1541569505000},"page":"426-451","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":18,"title":["Machinability of titanium aluminides: A review"],"prefix":"10.1177","volume":"233","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5991-6599","authenticated-orcid":false,"given":"SD","family":"Castellanos","sequence":"first","affiliation":[{"name":"Faculdade de Engenharia da Universidade do Porto, Porto, Portugal"},{"name":"Universidad de las Fuerzas Armadas ESPE, Av. General Rumi\u00f1ahui, Sangolqu\u00ed, Ecuador"},{"name":"Instituto de Ci\u00eancia e Inova\u00e7\u00e3o em Engenharia Mec\u00e2nica e Engenharia Industrial, INEGI, Porto, Portugal"}]},{"given":"AJ","family":"Cavaleiro","sequence":"additional","affiliation":[{"name":"Instituto de Ci\u00eancia e Inova\u00e7\u00e3o em Engenharia Mec\u00e2nica e Engenharia Industrial, INEGI, Porto, Portugal"}]},{"given":"AMP de","family":"Jesus","sequence":"additional","affiliation":[{"name":"Faculdade de Engenharia da Universidade do Porto, Porto, Portugal"},{"name":"Instituto de Ci\u00eancia e Inova\u00e7\u00e3o em Engenharia Mec\u00e2nica e Engenharia Industrial, INEGI, Porto, Portugal"}]},{"given":"R","family":"Neto","sequence":"additional","affiliation":[{"name":"Faculdade de Engenharia da Universidade do Porto, Porto, Portugal"},{"name":"Instituto de Ci\u00eancia e Inova\u00e7\u00e3o em Engenharia Mec\u00e2nica e Engenharia Industrial, INEGI, Porto, Portugal"}]},{"given":"J Lino","family":"Alves","sequence":"additional","affiliation":[{"name":"Faculdade de Engenharia da Universidade do Porto, Porto, Portugal"},{"name":"Instituto de Ci\u00eancia e Inova\u00e7\u00e3o em Engenharia Mec\u00e2nica e Engenharia Industrial, INEGI, Porto, Portugal"}]}],"member":"179","published-online":{"date-parts":[[2018,11,7]]},"reference":[{"key":"bibr1-1464420718809386","doi-asserted-by":"publisher","DOI":"10.1002\/3527602119"},{"key":"bibr2-1464420718809386","volume-title":"Titanium","author":"L\u00fctjering G","year":"2007"},{"key":"bibr3-1464420718809386","doi-asserted-by":"publisher","DOI":"10.1016\/B0-08-043152-6\/00745-2"},{"key":"bibr4-1464420718809386","volume-title":"Introduction to aerospace materials","author":"Mouritz AP","year":"2012"},{"key":"bibr5-1464420718809386","volume-title":"Materials properties handbook: titanium alloys","author":"Firm K","year":"1994"},{"key":"bibr6-1464420718809386","doi-asserted-by":"publisher","DOI":"10.1016\/S0921-5093(98)01158-7"},{"key":"bibr7-1464420718809386","doi-asserted-by":"publisher","DOI":"10.1007\/s11837-017-2534-0"},{"key":"bibr8-1464420718809386","doi-asserted-by":"publisher","DOI":"10.1016\/B0-08-043152-6\/00732-4"},{"key":"bibr9-1464420718809386","first-page":"1","volume":"3409","author":"Clemens H","year":"2016","journal-title":"Mater High Temp"},{"key":"bibr10-1464420718809386","doi-asserted-by":"publisher","DOI":"10.1080\/09603409.2016.1183068"},{"key":"bibr11-1464420718809386","unstructured":"MTU Aero Engines AG Corporate Communications and Public Affairs: Titanium aluminide\u2009-\u2009MTU Aero Engines develops new turbine blade material, http:\/\/www.mtu.de\/fileadmin\/EN\/7_News_Media\/1_Press\/3_Press_kits\/Paris_Air_Show_2017\/Backgrounder\/Titanaluminid_en.2017.final.docx (accessed 12 June 2018)."},{"key":"bibr12-1464420718809386","unstructured":"CORDIS European Commision: LIVALVES Report Summary High efficient production of TiAl valve blanks, https:\/\/cordis.europa.eu\/project\/rcn\/52097_en.html (accessed 9 January 2018)."},{"key":"bibr13-1464420718809386","doi-asserted-by":"publisher","DOI":"10.1016\/j.intermet.2005.08.009"},{"key":"bibr14-1464420718809386","doi-asserted-by":"crossref","unstructured":"Noda T. 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