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They have revealed the general occurrence of string-like collective atomic motion and its importance for understanding the typically non-Arrhenius dynamics of all these materials. In the present work, we extend our study of this type of collective motion in crystalline metal materials to consider the \u03b1\u2013\u03b2 displacive structural transition of titanium from its lower temperature hexagonal close-packed to body-centered cubic structure as the temperature (T) is elevated. In particular, we employ molecular dynamics simulation and focus on the role of string-like collective motion in mediating this displacive transition and the dynamics of the phase transformation process. Above the \u03b1\u2013\u03b2 transition temperature, as the temperature increases, we observe that the scale of collective motion progressively decreases, and the activation free energy of the moving interface of the new phase is well-described by the average string length Ls, similarly to \u03c4\u03b1 of glass-forming liquids. As a special feature of this transition, we find that the strings are localized in channels having a temperature-dependent width within the crystal. We thus find another physical example of a class of materials in which collective motion plays a crucial role in material dynamics.<\/jats:p>","DOI":"10.1063\/5.0280698","type":"journal-article","created":{"date-parts":[[2025,7,23]],"date-time":"2025-07-23T10:58:45Z","timestamp":1753268325000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":4,"title":["String-like collective motion mediates the martensitic <i>\u03b1<\/i>\u2013<i>\u03b2<\/i> transition in titanium"],"prefix":"10.1063","volume":"163","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-0588-9608","authenticated-orcid":false,"given":"Jiarui","family":"Zhang","sequence":"first","affiliation":[{"name":"Department of Chemical and Materials Engineering, University of Alberta 1 , Edmonton, Alberta T6G 1H9,","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7290-2300","authenticated-orcid":false,"given":"Jack F.","family":"Douglas","sequence":"additional","affiliation":[{"name":"Material Measurement Laboratory, Material Science and Engineering Division, National Institute of Standards and Technology 2 , Gaithersburg, Maryland 20899,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4080-3222","authenticated-orcid":false,"given":"Hao","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Chemical and Materials Engineering, University of Alberta 1 , Edmonton, Alberta T6G 1H9,","place":["Canada"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"317","published-online":{"date-parts":[[2025,7,23]]},"reference":[{"key":"2025072306584245400_c1","doi-asserted-by":"publisher","first-page":"1056","DOI":"10.1016\/j.jallcom.2018.06.076","article-title":"Effect of heat treatment on the phase transformation and mechanical properties of Ti6Al4V fabricated by selective laser melting","volume":"764","year":"2018","journal-title":"J.\u00a0Alloys Compd."},{"key":"2025072306584245400_c2","volume-title":"The Role of Metastability in Polymer Phase Transitions","year":"1998"},{"issue":"44","key":"2025072306584245400_c3","doi-asserted-by":"publisher","first-page":"2305336","DOI":"10.1002\/adma.202305336","article-title":"Inhibited grain growth through phase transition modulation enables excellent mechanical properties in oxide ceramic nanofibers up to 1700\u2009\u00b0C","volume":"35","year":"2023","journal-title":"Adv. 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