Tests　for　ultrasonic　elliptical　vibration-assisted　turning　(UEVT)　of　titanium　alloy　were　carried　out.　The　elliptical　trajectories　of　the　cutting　tool　under　different　power　supplying　levels　were　obtained.　The　variations　of　the　cutting　forces　in　UEVT　were　analyzed.　It　was　shown　that　compared　with　cutting　forces　in　conventional　turning　(CT),　the　cutting　forces　in　UEVT　decreases　obviously.　The　surface　roughness　in　UEVT　was　also　studied.　The　results　showed　that　compared　with　surface　roughness　in　CT,　the　surface　roughness　Ra　value　in　UEVT　is　a　little　bit　larger,　while　the　surface　roughness　Rz　value　decreases　obviously　in　UEVT.　The　effect　of　feed　rate　on　cutting　forces　was　analyzed.　It　was　shown　that　the　cutting　forces　increase　with　increase　in　the　feed　rate　both　in　CT　and　UEVT;　for　the　same　feed　rate,　the　cutting　forces　in　UEVT　are　less　than　those　in　CT;　the　reduction　level　decreases　with　increase　in　the　feed　rate.　The　morphologies　of　a　workpiece,　surface　were　observed　both　in　CT　and　UEVT.　It　was　shown　that　regular　vibration　marks　along　the　cutting　rate　direction　on　the　workpiece　surface　are　found　in　UEVT.　©,　2015,　Chinese　Vibration　Engineering　Society.　All　right　reserved.