1352
Today , WAAM has become a promising fabrication process for various engineering materials such as titanium , aluminium , nickel alloy and steel .
 manufacturing process: WAAM; manufacturing process: fabrication; material: engineering materials; material: as; material: aluminium; material: nickel alloy; material: steel
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 manufacturing process: WAAM; manufacturing process: fabrication; material: engineering materials; material: as; material: aluminium; material: nickel alloy; material: steel