The aim of this research is to demonstrate the growth of titanium dioxide nanorods. In our testing, growth of nanorods was achieved using the hot filament chemical vapor deposition method. We studied the effects of temperature and time on the growth of nanorods. We also investigated the effect of Co catalyst on the growth of nanorods so that we could measure the Ti content at different times and temperatures. Our samples were studied using scanning electron microscopy, Raman spectroscopy, energy-dispersive x-ray spectroscopy, dot mapping, and x-ray diffraction. Diameter and length of nanorods were 262.07nm and 719.41-821.38nm, respectively. Raman spectroscopy was indicative of two peaks (anatase and rutile). The anatase peaks were 650 degrees C, 490, 509, 558, 613, 787cm(-1); and the rutile peak was 435cm(-1). Results show that titanium dioxide nanorods had their best growth and penetration when Co was used as a catalyst at a time of 30min and a temperature of 650 degrees C.