Titanium And Its Alloys Find Applications N Space, Chemical, Food Processing And Biomedical Industries. But Processing, Particularly Machining Of Ti-Alloys Remain A Problematic Area. Titanium And Most Of Its Alloys Are Classified As Difficult To Machine, Due To Poor Tool Life, Low Productivity And Poor Product Quality. This Is Primarily Due To High Cutting Zone Temperature While Machining Titanium And Its Alloys. Low Thermal Conductivity Coupled With Higher Specific Strength, Segmented Chip Formation And Shorter Chip-Tool Contact Length Primarily Leads To Higher Cutting Zone Temperature And Thus Low Productivity. Machinability Of Titanium Alloys Could Not Even Be Improved Economically With The Advent And Use Of Modern Cutting Tool Materials Like Coated Carbides, Ceramics, Cbn And Diamond. Current Industrial Practice Is To Machine Titanium Alloys With Straight Carbide Cutting Tools Inserts With Sufficient Supply Of Coolants. Recently Two Of The Cooling Strategies, Namely Cryogenic Cooling By Liquid Nitrogen Jets And High Pressure Cooling By Water Soluble And Neat Oil Jets Have Been Reported To Improve Machinability Of Titanium Alloys. The Main Objective Of The Present Work Is To Study The Effect Of High Pressure Cooling With Water Soluble And Neat Oil Jets On Different Machinability Indices While Turning Ti- 6al-4v Titanium Alloy Using Uncoated Straight Microcrystalline Carbide Inserts Under Wide Domain Of Process Parameters Vis-À-Vis Conventional Cooling. To Enable Undertake The Present Study, First A Suitable High Pressure Coolant Delivery System With Coolant Application Nozzle Was Developed That Can Handle Both Water Soluble And Neat Oil To A Maximum Delivery Pressure Of 150 Bar. Analysis Of Experimental Results Enabled Inferring Following Major Conclusions: • A Coolant Delivery Pressure Of 100 Bar With A Nozzle Diameter Of 0.80 Mm, Impingement Angle Of 20o And 1.5 Mm Spot Distance Provided Robust Chip Breaking With Neat Oil As Coolant. • High Pressure Cooling With Neat Oil Yielded 100% Improvement In Tool Life And 21% More Productivity Even Compared To Cryogenic Cooling. • High Pressure Cooling With Water Soluble Oil Enabled Maximum Benefits With Respect To Tool Wear, Tool Life And Productivity Both Over High Pressure Cooling With Neat Oil And Conventional Cooling.