LAUSR

Significance The unconventional transport properties of anomalous metallic state (AMS), predominantly observed in two-dimensional systems, challenge the core physics principles of Fermi liquid theory, raising intriguing questions regarding the fundamental nature of pertinent physics. Here, we report an experimental discovery of a three-dimensional AMS in compressed titanium metal using pressure as a uniquely effective tuning parameter in a much less intertwined physical environment than those in traditional material templates for probing AMS, like cuprate-based superconducting films, which also host additional unresolved exotic physics that may impede a clean probe of AMS. Our results make the construction of an essential model more transparent, therefore holding great importance and promise for advancing the understanding of quantum transport behaviors in AMS.