{
  "abstract": "Ti-15Mo (wt%) is a well-established $β$-stabilized alloy whose mechanical response is strongly governed by phase stability and deformation mechanisms that operate at the single-grain scale. Because these intragranular mechanisms are intrinsically anisotropic, understanding the orientation dependence of the elastic and plastic response is critical to the texture-engineered processing of wrought components. Here, we quantify the nanomechanical anisotropy of single-crystal Ti-15Mo by combining EBSD with nanoindentation to correlate hardness, indentation modulus, strain rate sensitivity, and indentation yield response with the crystallographic surface normal near $\\langle111\\rangle,\\langle124\\rangle,\\langle011\\rangle,\\langle023\\rangle$, and $\\langle013\\rangle$ directions. While the modulus anisotropy is small (~10%), contrary to the prediction for a cubic crystal with A>1, orientations near $\\langle111\\rangle$ exhibit the lowest moduli. Yield onset is likewise softest near $\\langle111\\rangle$ and spans 41%, while hardness spans only 6.6% and follows neither the modulus nor the yield ordering. The alloy also exhibits yield behavior not captured by the simple CRSS/Schmid-factor models evaluated here. Strain-rate-jump tests yield V*=18-31b$^3$, consistent with kink-pair-nucleation-controlled plasticity; based on V*, the orientations separate into two groups suggestive of glide-dominated versus twin/transformation-participating response. We reveal an inversion of the elastic anisotropy expected for a homogeneous cubic $β$-phase and an orientation-dependent yield-onset response that is not reproduced by the simple Schmid-factor models examined here. Retained athermal $ω$ is proposed as the contributor because $β\\rightarrowω$ collapse occurs on {111}$_β$ planes and may provide anelastic compliance through the reversible $ω\\rightarrowβ$ transformation.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.18181",
  "author_total": 7,
  "authors": [
    {
      "name": "Kidus Abebe"
    },
    {
      "name": "David Gaetano"
    },
    {
      "name": "Aurelia Moriyama-Gurish"
    },
    {
      "name": "Jana Šmilauerová"
    },
    {
      "name": "Yanfei Gao"
    },
    {
      "name": "Udo D. Schwarz"
    },
    {
      "name": "Amit Datye"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dv7r9yjts3hr5.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.18181",
  "fulltext_url": null,
  "id": "dv7r9yjts3hr5",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.18181",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "2505|Titanium Alloys Microstructure and Properties"
    ]
  ],
  "openalex": "W7221808790",
  "pdf_url": "https://arxiv.org/pdf/2610.18181",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dv7r9yjts3hr5.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:11Z",
      "native_id": "2610.18181",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.18181"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Orientation-Resolved Nanoindentation of Single Crystal Ti-15Mo: Inverted Elastic Anisotropy and Yield-Onset Behavior Beyond Simple CRSS Predictions",
  "title_text": "Orientation-Resolved Nanoindentation of Single Crystal Ti-15Mo: Inverted Elastic Anisotropy and Yield-Onset Behavior Beyond Simple CRSS Predictions",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:11Z",
  "url": "https://research.draconitic.com/paper/dv7r9yjts3hr5",
  "venue": "arXiv",
  "versions": []
}