One-Off Titanium, Inc.
One-Off Titanium builds handcycles in their machine shop. Leni Fried Designs does beautiful bicycle painting and anodizing and printmaking. Leni also makes political and activist buttons and pins. All of these can be seen at this site.
http://www.titaniumarts.com

Pramor
Italian producer of pure titanium and beta titanium optical frames.
http://www.pramaor.com/

President Titanium
Established in 1973, President Titanium provides the largest inventory of domestic 6AL/4V, 6AL/4V ELI, and grade 4 titanium bar, sheet and plate in the country.
http://www.presidenttitanium.com/

International Titanium Association
Promotes the use of, and dissemination of, information about titanium.
http://www.titanium.org/

Spectrum Cycles
Individually Custom Designed and Handcrafted frames and bicycles in titanium and steel, Tom Kellogg and Jeff Duser invest their 50 years experience into each their creations.
http://spectrum-cycles.com/

Titanium Industries, Inc.
Global distributor of titanium and zirconium mill products for industrial, orthopaedic, recreation, and aerospace industry use.
http://titanium.com/

Titanium Corporation Inc.
A titanium-bearing heavy mineral sands project, located near Truro, Nova Scotia, Canada.
http://www.titaniumcorporation.com

Rewel Titanium
custom titanium bicycle frame, fahrradrahmen in titan maßgebaut, telai per bicicletta in titanio costruiti su misura, cuadros de bicicleta in titanio hecho a medida, cadres de bicyclette in titane
http://www.rewel.com

Titanium Tantalum Products Limited
TiTaN: electrolyer manufacturer, titanium, tantalum, zirconium, nickel, monel, inconel, hastelloy, niobium cladded, lined, solid, mmo anode, platinum anode, pump, heat exchanger, valve
http://www.titanindia.com/

MAGMAA Titanium
High Quality Titanium Bicycle Frames and Components
http://www.magmaa.com/