GB/T 6611-2025Terminology and atlas for titanium and titanium alloys (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part

1.Structure and Drafting Rules of Standardization Documents". Drafting. This document replaces GB/T 6611-2008 "Terminology and Metallographic Atlas of Titanium and Titanium Alloys". Compared with GB/T 6611-2008, except for the structure... Aside from adjustments and editorial changes, the main technical changes are as follows:

a) Some terms and definitions have been changed. alloy (see 3.1.4,

2.1 of the.2008 edition), sponge titanium (see 3.2.1,

3.1 of the.2008 edition), Industrial pure titanium (see 3.2.3,

3.3 in the.2008 edition), alpha-titanium alloys (see 3.2.5,

3.5 in the.2008 edition), near-alpha-titanium alloys (see...) 3.2.6 (

3.6 in the.2008 edition), alpha-beta titanium alloys (see

3.2.7 in the.2008 edition), beta titanium alloys (see

3.2.8 in the.2008 edition) 3.8), annealing (see 3.7.3,

4.2 in the.2008 edition), quenching (see 3.7.11,

4.8 in the.2008 edition), alpha-stabilizing elements (see 3.8.3,

5.1 of the.2008 edition), beta-isomorphic stable elements (see 3.8.6,

5.2 of the.2008 edition), martensitic phase transformation initiation temperature (see 3.8.14, 5.8 (2008 edition), martensitic transformation termination temperature (see 3.8.15, 5.9 (2008 edition), equiaxed structure (see...) 3.8.23,

1 Scope

GB/T 6611-2025 is the Chinese national standard covering the vocabulary of titanium with the micrographs to go with it - the alpha, beta and alpha-beta alloys, the transus and the heat treatments, the wrought structures and the defects, each term illustrated so that two metallurgists mean the same thing by it. At 22,000 words. It replaces GB/T 6611-2008, under the China Nonferrous Metals Industry Association. In force from 1 May 2026. Issued on 5 October 2025, it has been in force since 1 May 2026, replacing GB/T 6611-2008.

This document defines commonly used terminology in the field of titanium and titanium alloys, including general terms, titanium and titanium alloys, raw products, processed products, and melts. The terms and definitions for casting methods, processing methods, heat treatment, microstructure, and appearance defects are provided; microstructure maps and appearance defect maps are also given. This document applies to the production inspection and domestic and international trade of titanium and titanium alloy materials, smelting, casting, and processing products.

2 Normative references

This document has no normative references.