TiO2 nanoparticles (50-80 nm) are produced by simple nanomilling by stirred media mill. Reasonably high purity TiO2 nanoparticles are observed by inductively coupled plasma atomic emission spectroscopy. Thus, the prepared TiO2 nanoparticles are applied as inorganic nanofillers for direct methanol fuel cell nanocomposite proton-exchange membranes. Cross-linked sulphonated polyvinyl alcohol is used for membrane preparation. Water uptake and ion exchange capacity of membranes are observed to be enhanced due to increase in concentration of nanoparticles. Very high proton conductivity and extremely diminutive methanol permeability are achieved. In addition, the durability and lifetime is observed to be exceptionally good (>2000 h).