911
Ti-6Al-4V samples produced by electron beam melting ( EBM ) are welded using solid-state friction welding ( FW ) process .
 material: Ti-6Al-4V; concept or principle: samples; manufacturing process: electron beam melting; manufacturing process: EBM; manufacturing process: welded; concept or principle: solid-state; manufacturing process: friction welding; concept or principle: process
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:
 material: Ti-6Al-4V; concept or principle: samples; manufacturing process: electron beam melting; manufacturing process: EBM; manufacturing process: welded; concept or principle: solid-state; manufacturing process: friction welding; concept or principle: process