I am trying to grow TiO2 nanowire but in hydrothermal process autoclave is mandatory. But it is not available here. So what is the other fabrication process to grow nanowire propperly??
One option is to do a templated deposition inside the pores of nanoporous Anodic Aluminum Oxide (AAO, http://www.inredox.com/technology/anodic-aluminum-oxide/). For TiO2, sol-gel deposition should work. InRedox supplies AAO in different form factors and could assist in templated deposition.
Alternatively, have you considered nanotubular titanium oxide (NTO) that could be formed by anodic oxidation of Ti?