This comprehensive investigation examines the use of choline amino acid protic ionic liquids (CHAAPILs) as environmentally friendly additives for water-based cutting fluids (WBCFs). Notably, water alone is ineffective as a boundary lubricant for aluminum machining promoting cyclic hydrolysis that generates brittle Al(OH)₃ films while generating friction above dry sliding. As traditional petroleum-based lubricants are increasingly recognized for their detrimental environmental impact, the development of sustainable alternatives has become essential in the tribology community. Focusing on CHAAPILs derived from renewable amino acids and choline sources specifically formulated to transform water into a high performing machining fluids without compromising performance. By integrating these green additives into WBCFs aligns industrial practices with sustainable manufacturing goals, addressing ecological and operational demands.