The aim of this work was to study the synthesis and electrochemical properties of Ti 2
wt %-Si alloys prepared by mechanical alloying (MA) and heat treatment. The MA process was
performed under Ar atmosphere. The structural, morphological, and compositional evolutions during
the milling and subsequent heat treatment were investigated by X-ray diffraction, energy-dispersive
spectroscopy, and scanning electron microscopy. The electrochemical behavior was evaluated by
open circuit potential and linear sweep voltammetry measurements. The results showed that the MA
process promotes the formation of a supersaturated α-Ti-Si solid solution. During heat treatment,
the Si remaining in the mechanically alloyed powders and the Si from the α-Ti-Si supersaturated
solid solution reacted with Ti to form Ti-Si intermetallic compounds. These compounds have a fine
and homogeneous distribution in the α-Ti matrix, which cannot be achieved by conventional casting
methods. Additionally, the electrochemical evaluations revealed that the mechanically alloyed and
heat-treated Ti 2 wt %-Si powders have better corrosion resistance in 1.63 M H2SO4 than the pure
Ti and MA Ti-Si samples. This is likely due to the particular microstructure produced during the
milling and subsequent heat treatment