The　TiO2　nanotubes　arrays　were　synthesized,　on　substrate　of　ITO-coated　glass,　by　liquid　phase　deposition　with　the　hydrothermally　grown　ZnO　nanorods　as　template.　The　impacts　of　the　synthesis　conditions,　particularly　the　concentration　of　reagent　and　deposition　time,　on　microstructures　of　TiO2　nanotubes　and　corrosion　of　ZnO　nanorods　were　evaluated.　The　TiO2　nanotubes　were　characterized　with　scanning　electron　microscopy　and　energy　dispersive　spectroscopy.　The　results　show　that　a　higher　H3BO3　concentration　and　a　longer　deposition　time　negatively　affect　the　TiO2　nanotube　growth　because　of　faster　corrosion　of　ZnO　nanorods,　and　that　the　compactness　and　aspect　ratio　of　TiO2　nanotube　can　be　controlled　by　properly　adjusting　the　hydrothermally　growth　conditions　of　ZnO　nano-rods.　When　it　comes　to　field　emission　behavior,　TiO2　nanotubes　outperform　ZnO　nano-rods.　The　on-set　field　and　field　enhancement　factor　of　the　TiO2　nanotubes　were　found　to　be　4.　60　V/μm　and　10239,　respectively.