ChemGlobe: Titanium
   Electronic, thermal, and steric data along with an isotope table.
   http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/22.html

ChemicalElements.com: Titanium
   Basic information, atomic structure, and isotopes.
   http://www.chemicalelements.com/elements/ti.html

EnvironmentalChemistry.com: Titanium
   Atomic structure, chemical and physical properties, and table of nuclides.
   http://environmentalchemistry.com/yogi/periodic/Ti.html

It's Elemental: Titanium
   Basic physical and historical information.
   http://education.jlab.org/itselemental/ele022.html

LANL: Titanium
   History, sources, uses, and properties.
   http://periodic.lanl.gov/elements/22.html

Lenntech: Titanium
   Physical data, chemical properties, and health effects.
   http://www.lenntech.com/Periodic-chart-elements/Ti-en.htm

Radiochemistry of Titanium
   Full text of the monograph by Vincent J. Landis (San Diego State University, San Diego, California). [PDF]
   http://lib-www.lanl.gov/cgi-bin/getfile?rc000042.pdf

USGS Minerals Information: Titanium
   Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
   http://minerals.usgs.gov/minerals/pubs/commodity/titanium/

Visual Elements: Titanium
   Image, general and physical information, source, uses, key isotopes, and ionisation energies.
   http://www.chemsoc.org/viselements/pages/titanium.html

Wikipedia: Titanium
   Properties of the element, including its history, applications, and characteristics.
   http://en.wikipedia.org/wiki/Titanium