As a novel kind of titanium alloy materials, titanium foams or porous titanium has been obtained a rapid development in recent years. They are attractive for aerospace, biomedical, submarine, automobile and environmental protection applications because of their double attribute of structural and functional properties. This paper attempts to give a review on the newly-presented preparation methods of titanium foams or porous titanium since 2004. The methods are divided into two categories. A first group is based on powder metallurgy and the another is based on physical or chemical synthesis. The preparation process, technology characteristics, pore structure and properties of obtained titanium foams or porous titanium of each method are introduced in detail and its development tendency was as-pointed out through a comparative analysis.